The instrument revolves around a small set of concepts that determine allocation of duties, operational standards and spatial organisation on an aerodrome.

Operator responsibility: The text says plainly “An operator is responsible for marshalling and parking of the operator’s aircraft on an aerodrome” (s 2.1). That establishes the operator as the actor accountable for these ground operations. It also imposes an obligation on the operator to ensure any person designated for those duties uses the prescribed standard hand signals (s 2.2).

Designated person and signal use: The instrument relies on designated ground personnel to execute marshalling and parking, and mandates use of the Appendix I hand signals when doing so (s 2.2; s 4.1-4.2). The Appendix identifies the signalman’s recommended position vis‑à‑vis fixed‑wing aircraft (forward of the left wing tip within view of the pilot) and helicopters (where the signalman can best be seen) and permits the use of lights or illuminated devices where necessary (Appendix I Notes 1-2).

Aerodrome spatial control: Control of static parking areas is assigned to the aerodrome licence‑holder or proprietor. That party is responsible for designating parking areas (s 3.1), and the instrument forbids parking an aircraft outside those designated areas without permission (s 3.2). That is the mechanism by which the aerodrome retains spatial control of aircraft parking.

Standardisation of signals: The Appendix sets out the meanings of each signal and requires that those meanings be respected by persons giving signals (s 4.1-4.2; Appendix I). The Appendix includes a convention for numbering engines “for the signalman facing the aircraft, from right to left (i.e. No. 1 engine being the port outer engine)” (Appendix I Note 3), which standardises references to engines when starting, slowing or cutting engines (see signals 7, 9, 12). The Appendix contains a numbered catalogue of signals for manoeuvring, stopping, engine control, chocking, braking, winch operations and load release (Appendix I numbered signals 1-24).

Pilot obedience with safety carve‑out: Pilots in command are obliged to comply with signals so given, “except where a pilot in command of an aircraft considers that to do so would jeopardise the safety of the aircraft or of its passengers or of persons or property on the ground” (s 4.3). That creates a safety exception that is a practical operational constraint on absolute obedience.

Interplay of written rules and operational practice: The instrument is predominantly operational and prescriptive. It prescribes the standard signals and who must use them, and delegates spatial authority to the aerodrome operator. It does not, within the text provided, include definitions, enforcement penalties, or detailed compliance processes, so the practical effect depends on implementation by operators, aerodrome licence‑holders/proprietors and pilots within the conditions set out (s 1.1-4.3; Appendix I).

The instrument identifies and affects three principal groups and, indirectly, a set of supporting actors.

Aircraft operators: The primary burden falls on the operator. Section 2.1 states the operator is responsible for marshalling and parking of its aircraft at the aerodrome. Section 2.2 requires the operator to ensure any person designated for those duties uses the prescribed Appendix I standard hand signals. Practically, operators must select, designate and supervise ground personnel for these duties and ensure those personnel use the Appendix signals.

Designated ground personnel (signalmen and marshallers): Persons assigned to marshalling and parking duties are directly regulated. They must use the standard hand signals in Appendix I when performing marshalling and parking tasks (s 2.2; s 4.2; Appendix I). Appendix I also dictates where a signalman should position himself or herself relative to the aircraft and permits use of lights or illuminated wands, implying practical constraints on how these personnel will operate.

Aerodrome licence-holders and proprietors: The aerodrome licence‑holder or proprietor is responsible for designating parking areas on the aerodrome (s 3.1). The instrument prohibits parking outside those areas without permission granted by the licence‑holder or proprietor (s 3.2). That gives the aerodrome management authority to allocate space and to control on‑airfield parking behaviour.

Pilots in command: Pilots are required to comply with all signals given by ground personnel in relation to parking, subject to a safety exception that allows a pilot to refuse compliance if compliance would jeopardise safety of the aircraft, passengers, persons or property on the ground (s 4.3). That places an operational obligation on pilots to follow ground directions but preserves the pilot’s ultimate safety judgement.

Department of Defence aerodromes and regulatory frameworks: The instrument is applied to Department of Defence aerodromes where there is an arrangement under section 20 of the Civil Aviation Act 1988 (s 1.1). While the instrument does not specify how Defence implements it, those aerodromes are included where such an arrangement exists.

Other interested parties: Ground handling service providers, ground vehicle operators, air traffic and apron control units, insurers and maintenance crews are not named in the text, but will be affected insofar as operators and aerodrome proprietors designate and supervise ground personnel and parking areas in accordance with this instrument. The instrument’s requirements for signal use and parking area designation will influence the day‑to‑day activities of those parties, who will need to align operational procedures with the Appendix signals and the aerodrome’s parking designations.

Who pays: The instrument does not specify fees or cost recovery mechanisms. The text allocates responsibility to operators (s 2.1-2.2) and to aerodrome licence‑holders or proprietors for parking area designation (s 3.1). From those allocations, economic burdens such as recruitment, training, equipment (lights/illuminated wands), supervision and any signage or markings for parking areas will fall on the operator and on the aerodrome licence‑holder or proprietor respectively, though the instrument does not itself impose specific payment obligations.

Decision‑makers: Operators decide whom to designate for marshalling and parking duties and must ensure those persons use the Appendix I signals (s 2.2). Aerodrome licence‑holders or proprietors decide the location and boundaries of parking areas on the aerodrome (s 3.1). Pilots make real‑time decisions regarding whether to comply with a signal subject to the safety exception (s 4.3).

The instrument allocates a small number of positive duties and establishes one explicit operational right for pilots.

Duties

• Operator duties: The operator is explicitly responsible for marshalling and parking its aircraft at an aerodrome (s 2.1). The operator must ensure that any person designated for marshalling and parking duties uses the standard hand signals set out in Appendix I (s 2.2). These duties require operators to appoint ground staff and to ensure those staff use the prescribed signals; the instrument does not prescribe how operators must demonstrate compliance, how designation is to be recorded, or the level of supervision required.

• Aerodrome licence‑holder/proprietor duties: The aerodrome licence‑holder or proprietor is responsible for designating parking areas on an aerodrome (s 3.1). This is the instrument’s mechanism for spatial allocation of stands/bays/parking positions. The licence‑holder or proprietor therefore must make decisions about where aircraft may park and communicate permission requirements for parking outside those designated areas (s 3.2). The text does not specify form or timing of that communication.

• Signaller duties: Persons who give signals are required to give the signals set out in Appendix I “as required by persons involved in the parking of aircraft” (s 4.2). Appendix I sets out where the signalman should stand, that lights may be used, and how engines are to be numbered from the signalman’s perspective (Appendix I Notes 1-3 and signal descriptions).

Rights/Operational exceptions

• Pilot right/safety carve‑out: Pilots in command are required to comply with all signals given, except where obedience would jeopardise the safety of the aircraft, its passengers, or persons or property on the ground (s 4.3). That is an explicit operational right for the pilot to refuse or disregard a ground signal in circumstances where following it would be unsafe.

Specified practices and technical norms

• Use of standard hand signals: The instrument prescribes that the hand signals in Appendix I “have the meanings indicated” (s 4.1) and that they are to be used during parking operations (s 4.2). Appendix I also states that the signals are designed for the signalman using lights where necessary and that the meaning remains the same if bats, illuminated wands or torchlights are held (Appendix I Notes 1-2). The Appendix further provides a numbering convention for engines from the signalman’s viewpoint (Appendix I Note 3) and a catalogue of signal meanings (Appendix I signals 1-24).

Prohibitions

• Parking outside designated areas without permission: Section 3.2 provides a prohibition: “A person must not park an aircraft outside the areas designated in accordance with subparagraph 3.1 without permission of the aerodrome licence‑holder or proprietor, as the case may be.” The text does not supply any penalty attached to this prohibition.

Unspecified matters

• Record keeping, certification, training standards, enforcement mechanisms and penalty regimes are not contained within the instrument’s text. The instrument imposes duties in language that presupposes operators and aerodrome managers will adopt implementing procedures, but it does not itself prescribe compliance protocols, evidence requirements or sanctions.

Practical effect of duties and rights

• Operators and aerodrome managers must allocate resources to meet their respective duties (s 2.1-2.2; s 3.1). Ground personnel must be capable of demonstrating and applying the Appendix I signal set (s 4.1-4.2; Appendix I). Pilots retain an explicit operational safety discretion to refuse signals that would create risk (s 4.3).

The instrument, as provided, contains no explicit penalty provisions and no administrative enforcement mechanism. The text prescribes rules and duties but does not specify offences with associated fines, regulatory sanctions, or the identity of an enforcement agency within the document itself.

What the text does specify

• A prohibition: Section 3.2 states “A person must not park an aircraft outside the areas designated in accordance with subparagraph 3.1 without permission of the aerodrome licence‑holder or proprietor, as the case may be.” This is framed as a mandatory rule. However, the instrument does not attach a penalty, specify enforcement authority, or detail remedial measures within the same text.

• Pilot obligation and safety exception: Section 4.3 requires pilots to comply with signals except where safety would be jeopardised. The provision creates an operational duty but does not specify disciplinary or enforcement consequences for non‑compliance.

Implications of the absence of internal enforcement provisions

• Reliance on external frameworks: Because the document contains no penalty or enforcement clause, compliance enforcement is likely to be handled through other mechanisms outside the instrument’s text. Those mechanisms could include contractual arrangements (between operators and aerodrome proprietors), aerodrome operational rules enforced by the proprietor, or regulatory regimes referenced in the application clause (s 1.1) such as the Air Navigation Regulations 1947 and Civil Aviation Regulations 1988, but such cross‑references are in the application clause rather than in an enforcement clause. The instrument itself does not identify which external provisions will be invoked, nor does it specify how breaches under this instrument would be prosecuted or sanctioned.

• Operational enforcement: In practice, aerodrome licence‑holders or proprietors can exercise immediate operational control (for example by refusing parking permission, ordering an aircraft moved, or withdrawing services) consistent with s 3.1-3.2, but none of those actions are specified in the text as formal sanctions. Similarly, operators may enforce compliance with their designated personnel via internal employment discipline or contractual terms, but the instrument does not prescribe any required employer actions.

• Liability consequences: The instrument imposes duties (for example on operators and on aerodrome licence‑holders/proprietors) that could be relevant if a civil claim arises from a marshalling or parking incident, yet the text does not address civil liability or evidentiary presumptions. Any civil or criminal liability would thus need to be traced to other statutory provisions or common law principles, which are not contained in this text.

Risk areas left open by lack of explicit enforcement language

• Ambiguity about recourse: The absence of stated penalties or enforcement authority within the instrument creates ambiguity about where to go with allegations of non‑compliance, how to secure compliance quickly, and which regulatory or adjudicative avenue governs disputes arising under these rules.

• Potential reliance on local aerodrome rules or broader aviation legislation: Because the instrument applies in contexts governed by other aviation regulatory instruments (s 1.1), enforcement may be achieved under those instruments; however, that outcome is not stated here and therefore requires users to verify enforcement pathways externally.

Practical note for users

• Operators, aerodrome licence‑holders/proprietors, pilots and insurers should not assume this instrument supplies its own penalty or enforcement machinery. The instrument sets duties and locational constraints that parties will need to operationalise and enforce through their own rules, contracts and by referring to other aviation instruments or mechanisms not included in this text.

The instrument’s text itself references other regulatory instruments in its application clause and thereby limits its scope to aerodromes governed by those instruments. Beyond that reference, it contains no express cross‑statutory modification, repeal or enforcement cross‑reference.

Express cross‑references

• Application scope: Section 1.1 explicitly limits application to aerodromes established under the Air Navigation Regulations 1947, aerodromes licensed or authorised under the Civil Aviation Regulations 1988, and Department of Defence aerodromes subject to an arrangement under section 20 of the Civil Aviation Act 1988. That is a direct textual link to other instruments and statutes, confining where these marshalling and parking rules apply (s 1.1).

• Department of Defence aerodromes: By including Department of Defence aerodromes where an arrangement under s 20 of the Civil Aviation Act 1988 is in force, the instrument recognises that Defence aerodromes are treated equally where those arrangements exist (s 1.1), but the instrument does not specify how those arrangements interact with Defence operational command or defence‑specific security regimes.

Matters the instrument does not address but which may be in other laws

• Enforcement, penalties and sanctions: The instrument contains no penalty or enforcement clauses. Enforcement may therefore occur under the other aviation instruments referenced in s 1.1 or under general civil or criminal law, but the instrument itself does not specify those links.

• Occupational safety, employment, insurance and trespass: The instrument regulates marshalling and parking activities but does not address related duties under occupational health and safety laws, employment law, insurance obligations, or aerodrome access control beyond the parking permission rule in s 3.2. Those legal regimes may impose parallel or additional obligations on operators, signalmen and aerodrome proprietors, but the text does not elaborate on interactions.

• Air traffic control and apron control: The instrument requires the use of standard hand signals and designates responsibility for marshalling and parking, but it does not refer to how these requirements intersect with air traffic control, tower instructions, ground controllers, or aerodrome operating manuals. Where conflicts or overlaps exist, resolution mechanisms are not set out in the instrument itself.

• International standards and industry practices: The Appendix prescribes standard hand signals and signalman positioning. The instrument does not mention any international standards (ICAO, for example) or binding industry codes in the text; any such interaction is not addressed in this document.

Operational interaction implications

• Local rule‑making: Aerodrome licence‑holders and proprietors will likely need to produce operational rules, parking maps, signage and permission processes consistent with s 3.1-3.2 and in a way that meshes with other referenced regulatory instruments (s 1.1). Operators must align their ground handling procedures with the Appendix signals and with any aerodrome rules.

• Safety exception and other safety duties: Section 4.3 gives pilots a discretion to disregard signals that would jeopardise safety. Where other safety duties exist under separate occupational health and safety laws or other aviation regulations, those duties could operate alongside the safety carve‑out here; the instrument does not resolve potential conflicts.

• Need for cross‑referencing in practice: Users should treat this instrument as a narrowly focused operational prescription that sits within a wider web of aviation regulation. Because it references other instruments for its territorial application (s 1.1), compliance and enforcement questions frequently will require consulting those instruments and any applicable aerodrome operating manuals, but those texts are not provided here.

The text supplied contains no explicit amendment history section, no dates of enactment or commencement, and no record of prior versions or amendments embedded within the document. The instrument itself does not contain marginal notes or footnotes about prior amendments.

What the supplied document shows

• No recorded amendments: The instrument’s body as provided , sections 1 through 4 and Appendix I , contains no references to earlier versions, no “amended by” notes and no insertions showing changes. The absence of such material in the supplied text means the reader must treat the supplied text as the operative text without an internal visible paper trail of legislative change.

• Cross‑referenced external instruments: Section 1.1’s reliance on the Air Navigation Regulations 1947 and the Civil Aviation Regulations 1988 suggests that any historical relationship or amendments might also appear in those instruments or in arrangements under s 20 of the Civil Aviation Act 1988 for Defence aerodromes. However, the current document does not reproduce amendment notes from those instruments.

Practical implications

• Confirm external records: Users requiring an authoritative amendment history or parliamentary history will need to consult the official legislative database or the primary statute/regulation repositories for records of enactment dates, amending instruments and commencement notices. Those searches are outside the scope of the present text because no such history is included here.

• Risk of multiple versions in circulation: Because the Appendix contains images referenced by filename (for example image.001.png in Appendix I), differences in reproductions or later published editions could result in variant layouts or image updates. The instrument as presented does not provide a version identifier attached to the images, so users should verify they are working from the current authoritative source when compliance depends on visual material.

• Treat the document as current but unannotated: For operational decision‑making, treat the supplied text as stating current duties and norms, but where legal precision about amendments, commencement dates or repeal history is required, consult official legislative records.

The supplied text contains no litigation history, case references or citations to judicial decisions. It names no cases and includes no footnotes or annotations indicating disputes, interpretations or judicial treatment.

What the document itself provides

• No case law references: The instrument does not cite or summarise any judicial decisions. It is purely prescriptive and operational in character.

Implications for users seeking judicial interpretation

• No internal precedent guidance: Because the instrument offers no litigation history or references to judicial interpretation, any questions about how its provisions have been construed in disputes will require independent legal research outside of this text.

• Potential avenues for dispute resolution: The instrument creates duties (operator responsibility, parking area control, signal compliance obligations with a pilot safety exception) that could be implicated in civil liability claims or administrative proceedings, but the text does not indicate whether disputes should be brought under other aviation statutes, contractual arrangements, or general tort law. Those procedural choices and precedents will need to be researched in the courts and tribunals that handle aviation matters.

Practical note

• Where legal risk is material (for example in an incident involving marshalling or parking), practitioners should seek external case law on analogous provisions, or litigation involving the Air Navigation Regulations or Civil Aviation Regulations referenced in s 1.1, because the present instrument contains no judicial gloss or interpretive history on its terms.

This instrument is short and operational, but several practical and legal gaps or potential sources of confusion arise directly from the text. The following are concrete items a practitioner or operator should watch for, each grounded in the supplied text.

1. No enforcement or penalties in the instrument

• The text includes a prohibition against parking outside designated areas without permission (s 3.2), but contains no penalty, sanctioning mechanism or enforcement agency. That creates uncertainty about the immediate legal consequence of non‑compliance under this instrument and places greater importance on contractual and local enforcement measures.

2. Undefined terms and delegation of practical choices

• The instrument uses terms such as “operator,” “person designated,” “aerodrome licence‑holder” and “proprietor” without defining them in the text provided. That leaves open potential questions about who formally counts as an “operator” for multi‑operator organisations, whether ground handling contractors are “operators” for the purpose of s 2.1-2.2, and how designation must be recorded or communicated.

3. Ambiguity over who pays for compliance costs

• Duties are allocated but the instrument does not specify cost‑recovery mechanisms. Operators must ensure designated marshallers use the Appendix signals (s 2.2), and aerodrome licence‑holders/proprietors must designate parking areas (s 3.1). The instrument does not state whether aerodromes must furnish lighting or equipment, nor whether operators bear costs of wands or other signalling aids.

4. Reliance on Appendix imagery and layout

• Appendix I includes images referenced in the text (for example image.001.png). If operational personnel have a printed or truncated copy lacking images, their ability to interpret some signals may be impaired. Appendix I does provide textual descriptions for each signal, but the images are part of the Appendix. Practically, ensure the Appendix is available in full visual form where crews need it (Appendix I).

5. Possible confusion about engine numbering for signalmen

• Appendix I Note 3 states “The aircraft engines are numbered, for the signalman facing the aircraft, from right to left (i.e. No. 1 engine being the port outer engine).” Because engine numbering conventions can vary by manufacturer and operation, reliance on the signalman‑facing convention requires that both signalmen and pilots share the same understanding. The instrument does not require supplementary marking or confirmation protocols; operators should make this explicit in training and local procedures to avoid misunderstanding.

6. Pilot compliance with safety exception , evidentiary risk

• Section 4.3 obliges pilots to comply with signals “except where a pilot in command ... considers that to do so would jeopardise the safety of the aircraft or of its passengers or of persons or property on the ground.” That language leaves the pilot’s determination as the operative criterion. In the absence of specified enforcement or appeal mechanisms, disputes about whether a pilot was justified in disregarding a signal will turn on fact‑finding about what the pilot “considered” and whether the consideration was reasonable , but the instrument does not define evidentiary standards or processes for resolving such disputes.

7. No requirement for training standards or certification of signalmen

• The instrument requires operators to ensure designated persons use the standard signals (s 2.2) but sets no training curriculum, certification or minimum competency standard. That omission increases operational risk if different operators apply different training regimes.

8. Permission process is unspecified

• Section 3.2 bars parking outside designated areas without permission, but the text does not define the process, timing or form of such permission, nor who can grant it on behalf of the licence‑holder or proprietor. Without formal permission protocols, disputes about whether permission was given may arise.

9. Limited scope of application

• The instrument applies only at aerodromes falling within the enumerated instruments and arrangements (s 1.1). It does not say what applies at aerodromes outside that list, which could lead to uncertainty where jurisdictional lines are blurred.

10. Interplay with other operational systems omitted

• The instrument does not describe integration with air traffic control, apron control, automated docking guidance systems, ground vehicle movements, or other safety management systems. Operators must plan for that integration themselves.

For each of these “gotchas,” the remedy is operational: document definitions and delegation, train personnel with reference to Appendix I, adopt formal permission and communications protocols for parking outside designated areas, and ensure the Appendix with images is included in ground operations manuals. The instrument mandates certain behaviours, but practical compliance requires local rules and evidential procedures not specified in the text.

The instrument prescribes specific duties and a detailed Appendix of hand signals; compliance requires translating those prescriptions into operational procedures, training and documentation. The following compliance checklist is grounded in the instrument’s provisions.

1. Confirm applicability

• Verify the aerodrome is within the instrument’s application: established under the Air Navigation Regulations 1947, licensed or authorised under the Civil Aviation Regulations 1988, or a Department of Defence aerodrome subject to a s 20 arrangement under the Civil Aviation Act 1988 (s 1.1). If so, the instrument applies.

2. Allocate responsibilities internally

• Operators: Accept responsibility for marshalling and parking of the operator’s aircraft on the aerodrome (s 2.1).
• Aerodrome licence‑holder/proprietor: Ensure the aerodrome has clearly designated parking areas (s 3.1), and publish procedures for granting permission to park outside designated areas (s 3.2).

3. Designate and document marshalling personnel

• Operators must designate persons for marshalling and parking duties and ensure those persons will use the standard hand signals in Appendix I (s 2.2). Create a documented list of designated personnel, roles and contact points.

4. Train designated personnel on Appendix I

• Provide training that covers:
  • All Appendix I signals and their textual descriptions (Appendix I signals 1-24; s 4.1-4.2).
  • Signalman positioning for fixed‑wing aircraft (forward of the left wing tip within view of the pilot) and helicopters (where signalman can best be seen); use of lights where necessary (Appendix I Notes 1-2).
  • Engine‑numbering convention as stated in Appendix I Note 3 so that signals referencing engine numbers (e.g. signals 7, 9, 12) are applied consistently from the signalman’s viewpoint.
  • Use of illuminated bats/wands/torchlights as equivalents to hand signals where required (Appendix I Note 2).
• Keep a training record showing that each designated marshaller has received instruction on the Appendix signals.

5. Provide equipment and visual aids

• Ensure signalmen have appropriate signalling aids (wands, bats, torches or lights) and that runway/apron lighting is sufficient for night operations as contemplated by Appendix I Note 1.
• Make full Appendix I available in operational areas, in both textual and visual forms (images referenced in Appendix I), so signalmen and flight crews can reference the standard signals.

6. Develop and publish aerodrome parking area maps and permission procedures

• Aerodrome licence‑holders/proprietors should produce clear maps showing designated parking areas (s 3.1).
• Publish the process for granting permission to park outside designated areas, including who may grant permission, any notification requirements and any conditions attached to permission (s 3.2 requires permission but does not prescribe process; best practice is to formalise it).

7. Integrate pilot compliance and safety exception protocols

• Inform pilots that they must comply with all signals given (s 4.3) but that they retain the right to refuse where compliance would jeopardise safety. Develop a standard reporting and investigation process for incidents where pilots decline to follow a signal on safety grounds to document the event and preserve evidence.

8. Coordinate with ground control and other stakeholders

• Ensure marshalling procedures align with any apron control, ground vehicle operations, air traffic control or other local operational rules. While the instrument does not specify these interactions, practical safety depends on coordination.

9. Record‑keeping and incident procedures

• Although the instrument does not require records, keep:
  • Designation lists for personnel (who is authorised to give signals).
  • Training attendance and competency records.
  • Parking area maps and change logs.
  • Permission logs for any parking outside designated areas, including who authorised it and why.
  • Incident reports for any event where signals were ignored, misinterpreted, or where a pilot invoked the safety exception (s 4.3).

10. Review contractual arrangements

• Operators that outsource ground handling should ensure contracts require the provider’s staff to use Appendix I signals and to comply with the operator’s designation and training requirements (s 2.2). Aerodrome proprietors should ensure agreements with tenants and service providers reflect the obligation to comply with parking area designations (s 3.1-3.2).

11. Audit and update procedures

• Periodically audit compliance with Appendix I use, staffing designation lists, permission logs for parking outside designated areas, and pilot incident reports. Update procedures and training to reflect operational findings.

12. Legal and insurance checks

• Because the instrument contains no penalty or enforcement clauses, verify with legal and insurance advisers how breaches are treated under other applicable aviation regulations and under applicable civil liability frameworks. Ensure that insurance policies and contractual indemnities reflect the allocation of responsibilities under s 2.1-2.2 and s 3.1-3.2.

Each step above is derived from explicit text: operator responsibility and obligation to ensure use of Appendix I (s 2.1-2.2); aerodrome duty to designate parking areas and prohibiting parking outside designated areas without permission (s 3.1-3.2); requirement to use and interpret Appendix I signals, including suggested signalman positions and lighting use (s 4.1-4.3; Appendix I Notes 1-3 and signals 1-24). Implementing these steps will convert the instrument’s prescriptions into operational practice and create documentary evidence of compliance.