Statement of Principles concerning chronic multisymptom illness (Balance of Probabilities) (No. 4 of 2020)

The instrument rests on a small set of tightly framed legal‑medical concepts. Each concept is defined or operationalised in the instrument itself, and those definitions determine what must be proved for a claimant to rely on this Statement of Principles.

Chronic multisymptom illness (CMI)

• A defined clinical construct, requiring diagnosis by a specialist physician or a psychiatrist (s 7(2)). The diagnosis must be based on a collection of somatic symptoms and must meet three cumulative criteria: (1) one or more current symptoms from at least two of three enumerated categories (fatigue; mood‑cognition; musculoskeletal) (s 7(2)(1)(i)-(iii)); (2) the symptom collection is distressing and results in significant disruption of social and occupational functioning (s 7(2)(B)); and (3) the collection of symptoms has persisted for at least six consecutive months (s 7(2)(C)). The instrument therefore ties the legal recognition of CMI to specific clinical findings, symptom clusters, functional impact and a minimum duration.

Death from CMI

• Defined to include deaths where the terminal event or condition was "contributed to" by the person’s chronic multisymptom illness (s 7(3)). The Schedule provides examples of what counts as a "terminal event" (pneumonia, respiratory failure, cardiac arrest, circulatory failure, cessation of brain function), but the instrument is not limited to those five examples as the Schedule states these are included in the meaning (Schedule, "terminal event").

Relevant service

• Expressly defined in the Schedule as (a) eligible war service (other than operational service) under the VEA; (b) defence service (other than hazardous service and British nuclear test defence service) under the VEA; or (c) peacetime service under the MRCA (Schedule, item 1). The instrument therefore excludes certain service categories by reference (for example operational service and hazardous service as the Schedule phrases those exclusions).

Causation standard and gatekeeping factor

• The instrument is framed for adjudications on the balance of probabilities. Its title and s 8 state that the RMA is of the view, on the sound medical‑scientific evidence available, that it is "more probable than not" that CMI and death from CMI can be related to relevant service (s 8). However, s 9 imposes a threshold factor that "must exist" before a causal connection on that standard can be made: inability to obtain appropriate clinical management for CMI. The Schedule does not define "inability to obtain appropriate clinical management", so that concept operates as an undefined but decisive legal element within this instrument.

Temporal and scope limitation

• Section 10 confines the application of the factor in s 9 to cases of "material contribution to, or aggravation of, chronic multisymptom illness where the person's chronic multisymptom illness was suffered or contracted before or during (but did not arise out of) the person's relevant service." This restricts the instrument's causal bridge to a subset of situations where the illness pre‑dated or coincided with service but did not arise out of the service itself.

Administrative nature

• The instrument is a Statement of Principles made under s 196B(3) of the VEA (s 3) and is therefore an administrative instrument intended to guide statutory determinations about service connection for VEA/MRCA claims (s 5). It sets medical and causation criteria rather than creating entitlements, offences, or procedural rules.

Primary affected persons

• Veterans and serving members who have "relevant service" as defined in the Schedule and who have, or claim death from, chronic multisymptom illness (s 5; Schedule, item 1). The instrument explicitly notes the 2014 Statement of Principles followed an investigation into Gulf War syndrome but states that the 2020 instrument "applies to all veterans and serving members with relevant service who have an illness which meets the definition" (note to s 4). Therefore the class is not limited to Gulf War veterans but is limited by the Schedule's definition of relevant service.

Claimants and beneficiaries

• Persons lodging claims under the specific statutory hooks identified in s 5: claims to which section 120B of the VEA or section 339 of the MRCA applies. The instrument will therefore be invoked by administrative decision makers dealing with those claims. The instrument does not itself create eligibility criteria for benefits beyond its role in causation; however it directly affects the evidentiary pathway for claimants by specifying diagnostic and causal thresholds (s 7, s 9).

Medical practitioners

• Specialist physicians and psychiatrists are directly implicated because the instrument requires CMI to be "diagnosed by a specialist physician or a psychiatrist" (s 7(2)). Those practitioners' records and opinions will be central to establishing the diagnosis element of CMI and therefore to the outcome of claims that rely on this Statement of Principles.

Administrative decision makers

• The Repatriation Medical Authority made the instrument (s 3), and administrators who adjudicate claims under the VEA and MRCA will apply the instrument's definitions and the threshold factor in s 9 in determining whether, on the balance of probabilities, CMI or death from CMI is connected with relevant service.

Excluded or differently affected groups

• Persons whose illness "arose out of" their relevant service are explicitly excluded from the part of the instrument that treats material contribution or aggravation where the illness was "suffered or contracted before or during (but did not arise out of) the person's relevant service" (s 10). The instrument therefore does not engage as drafted for claims where the illness can be characterised as having arisen out of the service in question; other Statements of Principles or legal pathways may apply to those cases.

Other parties with interest

• While not named, parties who may be involved in claims processing , such as treating general practitioners, allied health professionals, tribunals or insurers engaged in parallel processes , will find the instrument relevant in that it sets out the required specialist diagnosis, symptom clusters, functional impact and duration needed to meet the CMI definition (s 7(2)), and identifies an undefined but decisive factor to be proved (s 9).

What the instrument requires of claimants and of the decision process

• Establishing the legal‑medical entity: For an administrative decision maker to accept that a person has chronic multisymptom illness under this Statement of Principles, the person must have a diagnosis by a specialist physician or a psychiatrist and must satisfy all three diagnostic sub‑requirements set out in s 7(2): symptoms from at least two categories, significant disruption of social and occupational functioning, and persistent symptoms for at least six consecutive months. The instrument therefore places a de facto duty on claimants to produce or cause to be produced specialist medical evidence that addresses each element of s 7(2).

• Proving the causation factor: Section 9 provides a single factor that "must exist" before connection on the balance of probabilities can be said: inability to obtain appropriate clinical management for chronic multisymptom illness. That is presented as a mandatory precondition to establishing that the illness or death is connected with relevant service. The instrument does not define how that factor is to be proved, nor does it list the kinds of evidence accepted, but it makes the existence of that factor an essential component of causation under this Statement of Principles. Practically, a claimant will need to provide evidence that addresses this factor in order for an administrative decision maker to find service connection under this instrument.

• Temporal limitation on application to contribution or aggravation: Section 10 constrains the application of s 9 to situations where the illness was suffered or contracted before or during (but did not arise out of) relevant service, and the question is material contribution or aggravation. That limits the rights conferred by the instrument to a specific factual posture. If the illness arose out of relevant service, this instrument’s factor and pathway do not apply to findings of material contribution or aggravation under its terms.

What the instrument asserts as the RMA’s view

• Section 8 sets out the RMA’s conclusion, on the sound medical‑scientific evidence available, that it is more probable than not that chronic multisymptom illness and death from it can be related to relevant service. That is a declarative finding intended to inform decision makers applying the balance of probabilities standard in relevant statutory provisions, and it functions as a right for claimants to rely on that medical‑scientific conclusion subject to meeting the instrument's defined diagnostic and causal prerequisites.

What it does not do

• The instrument does not create procedural obligations such as time limits or evidentiary rules for presenting medical records. It does not specify remedies, entitlements, or payments; those remain matters for the VEA and the MRCA as applicable. It does not establish offences or civil penalties. It also does not define "inability to obtain appropriate clinical management" or provide examples or criteria for that factor.

Duties of medical witnesses

• The instrument makes specialist diagnosis a key gate for recognition of CMI (s 7(2)). While not framed as a duty of the medical profession, the practical effect is that specialist physicians and psychiatrists’ reports will be the central medical evidence for satisfying the CMI diagnostic elements. The instrument therefore elevates the evidentiary weight of specialist assessments in the claims process.

Decision‑maker discretion

• By setting an undefined but mandatory factor in s 9, and by offering the RMA’s view in s 8 without prescribing decision processes, the instrument leaves substantial scope for adjudicator discretion in interpreting whether the factor exists and whether the diagnostic elements are satisfied. The instrument does not bind courts or tribunals, but it performs the legislatively authorised function of guiding administrative determinations under the referenced statutory provisions (s 3, s 5).

No penal provisions in the instrument

• The Statement of Principles contains no offence, penalty, or enforcement mechanism. There is no provision imposing financial sanctions, criminal liability, civil damages, or similar punitive measures. The instrument is a determinative statement of medical causation intended to be applied in administrative decision making under the VEA and MRCA (s 3, s 5).

Administrative application and consequence

• Enforcement in practice occurs via administrative decision making on claims under section 120B of the VEA or section 339 of the MRCA to which the instrument applies (s 5). The practical consequence of the instrument is that it informs whether claimants meet the causation threshold for service connection in those statutory contexts. Success or failure to meet the instrument’s defined elements will affect entitlement outcomes under the VEA and MRCA but the instrument itself does not prescribe those entitlements.

No express review or appeal mechanism

• The instrument does not include procedural provisions setting out review or appeal avenues against decisions that apply it. Any review or appeal rights would be those provided by the VEA or MRCA and relevant administrative law, but such mechanisms are outside the text of this instrument. The instrument simply provides the medical and causation criteria decision makers are to use in relevant claims.

Obligations on decision makers

• The instrument is made under subsection 196B(3) of the VEA (s 3), which authorises the RMA to determine Statements of Principles. That statutory authorisation suggests that the instrument is an input into statutory decision processes. The instrument itself does not create enforcement powers; it is a source of medical opinion for administrative determinations. The Schedule and substantive sections therefore govern the content of those determinations rather than imposing enforcement schemes.

Implications for medical professionals and providers

• There are no statutory penalties or professional sanctions contained in the instrument for medical professionals who provide diagnoses or management. However, the practical effect is that specialist physicians and psychiatrists will be the authorising clinicians for diagnosis under s 7(2), and their professional records and opinions will be decisive in claims. Any professional discipline would have to be pursued under other regulatory regimes; the instrument itself does not address that.

Relationship with the VEA and MRCA

• The instrument is made under subsection 196B(3) of the Veterans' Entitlements Act 1986 (s 3) and expressly applies to claims to which s 120B of the VEA or s 339 of the Military Rehabilitation and Compensation Act 2004 apply (s 5). It is therefore an interpretive and evidentiary instrument in the statutory frameworks administered under those Acts. The instrument provides the medical criteria and the causal factor that decision makers use when determining whether, on the balance of probabilities, chronic multisymptom illness or death from it is connected with relevant service.

Dependence on statutory definitions external to the instrument

• The Schedule defines "relevant service" by reference to categories under the VEA and MRCA (Schedule, item 1). Those referenced terms , "eligible war service", "defence service", "peacetime service", "operational service", "hazardous service", and "British nuclear test defence service" , are not further defined in this instrument; rather, they rely on the definitions and statutory regimes in the VEA and MRCA. Thus, to apply the instrument in any given claim an administrator will need to import statutory meaning from the VEA and MRCA.

Operational exclusions embedded in this instrument

• By specifying in the Schedule that "relevant service" excludes certain kinds of service (for example operational service and hazardous service in the ways specified), the instrument narrows its own applicability relative to all possible service types. Determinations about whether a claimant’s service falls within the Schedule’s categories will therefore require reference to VEA and MRCA definitions and factual proof of the character of the service in issue.

Interaction with existing or prior Statements of Principles

• Section 4 repeals the earlier Statement of Principles concerning chronic multisymptom illness No. 56 of 2014. Where a decision maker previously relied on the 2014 instrument, the 2020 instrument now governs future claims to which s 120B or s 339 applies. The note to s 4 records that the 2014 Statement followed an investigation concerning Gulf War syndrome; however the instrument states the 2020 Statement applies to all veterans and serving members with relevant service and an illness meeting the definition. Any claims decided prior to the commencement date remain subject to applicable transitional or administrative arrangements, though the instrument itself does not specify such transitional rules.

Evidential and procedural law

• The instrument prescribes substantive criteria for diagnosis and causation but does not prescribe how evidence must be presented, authenticated, or weighed. Those procedural and evidential rules are therefore governed by the procedural law and administrative rules governing decisions under the VEA and the MRCA, including any tribunal or court processes if decisions are judicially reviewed or appealed. The Statement of Principles functions as medical evidence of the RMA’s view on causation under the statutory standard of balance of probabilities (s 8).

Potential overlap or gaps with other legal processes

• The instrument addresses only causation for CMI and death from CMI within the specified class of claims. Other legal processes that touch on medical causation , for example workers compensation, private insurance claims, or civil actions , are not governed by this instrument. The instrument does not state that its conclusions are binding outside the relevant VEA or MRCA processes, though administrative decision makers within those systems are authorised to use Statements of Principles determined by the RMA.

Single replacement and commencement

• The instrument is captioned as "No. 4 of 2020" and bears an adoption date of 28 February 2020 (front matter) and a stated commencement date of 23 March 2020 (s 2). It expressly repeals the earlier Statement of Principles concerning chronic multisymptom illness No. 56 of 2014 (s 4), which had been made under the same subsection 196B(3) of the VEA (s 4).

Contextual notes in the instrument

• The instrument includes an explanatory note to the repeal (s 4 note) stating that the 2014 Statement of Principles arose from an investigation concerning Gulf War syndrome that commenced on 31 October 2012. The same note states that although the 2014 investigation concerned Gulf War veterans, the 2020 Statement "applies to all veterans and serving members with relevant service who have an illness which meets the definition." That note, while not itself an amendment, documents the procedural history leading into this repeal and replacement.

No further amendments recorded in the instrument

• The text provided contains no subsequent amendments, variations, or schedules amending other instruments. The instrument is self‑contained and shows a single, discrete legislative action: the 2020 Statement of Principles replacing the 2014 Statement with a clear commencement date.

Implication for prior decisions

• Because the instrument repeals the 2014 Statement, decisions made after the commencement date that fall within the scope of s 5 should be determined with reference to the 2020 Statement. The instrument itself does not set out transitional provisions, savings, or express retrospective effect. The practical effect of the repeal and replacement on ongoing claims or appeals will be determined by the procedural rules applicable to those claims under the VEA and MRCA and by any guidance issued by administering agencies, none of which are contained within this instrument.

No amending history beyond replacement in the text provided

• The instrument does not record any subsequent reconsideration, amendment or repeal of its own provisions. The only amendment history visible in the document is the replacement of the 2014 Statement by this 2020 Statement.

No cases or tribunals cited

• The instrument itself contains no reference to litigation, tribunal decisions, or judicial consideration interpreting its terms. It does not cite cases, and no judgments are reproduced or summarised within the text.

Prior investigative context noted but not judicially described

• The note in s 4 records an administrative investigation commenced on 31 October 2012 that led to the 2014 Statement of Principles concerning Gulf War syndrome. The instrument does not describe litigation arising from that investigation or from the 2014 Statement. The note merely provides factual context for the replacement.

Implications for future litigation

• While the instrument does not include litigation history, the structure of the instrument suggests likely points that could generate litigation or review: the undefined but decisive nature of "inability to obtain appropriate clinical management" (s 9); the diagnostic elements requiring specialist diagnosis and functional disruption (s 7(2)); and the temporal limitation in s 10. These are potential interpretive battlegrounds if administrative decisions applying this instrument are judicially reviewed or appealed, but the instrument itself provides no litigation record.

No judicial interpretation precedent recorded

• There are no reported judicial or tribunal interpretations included in the document provided. Any commentary on how courts or tribunals have subsequently applied or interpreted this Statement of Principles would require examination of decisions outside this instrument, which are not contained in the legislative text supplied.

Undefined crucial factor

• The factor in s 9, "inability to obtain appropriate clinical management for chronic multisymptom illness", is critical because s 9 states it "must exist" before connection on the balance of probabilities can be said. The instrument does not define what constitutes "inability", what counts as "appropriate clinical management", or the temporal relation of that inability to the onset, persistence or aggravation of the illness. That absence of definition makes s 9 a pivotal and potentially contested element in any claim relying on this Statement of Principles.

Specialist diagnosis requirement

• CMI must be "diagnosed by a specialist physician or a psychiatrist" (s 7(2)). General practitioner diagnoses without specialist corroboration will not meet the instrument’s diagnostic threshold. Claimants relying on non‑specialist reports risk their evidence being insufficient under s 7(2).

Symptom clustering and current symptoms

• The diagnosis requires "one or more current symptoms" from two of the three listed categories (s 7(2)(1)). The term "current" indicates that symptoms must be present at the time of diagnosis or assessment relied upon by the claimant. If a claimant’s medical evidence documents past symptoms that are no longer current, that evidence may not meet the instrument’s literal requirement.

Functional disruption and its proof

• Section 7(2)(B) requires that the collection of symptoms be "distressing and results in significant disruption of social and occupational functioning." The instrument does not quantify "significant" or prescribe objective measures. Claimants will therefore likely need medical, occupational, or social evidence that addresses the functional impact. The absence of objective thresholds means adjudicators will exercise evaluative judgment in assessing whether the functional disruption meets the instrument’s language.

Minimum duration

• The symptoms must have "persisted for at least six consecutive months" (s 7(2)(C)). Intermittent or episodic symptom histories that do not show a six‑month continuous period may fail to satisfy this threshold.

Temporal limitation on causal findings

• Section 10 limits the application of s 9 to cases where the illness was "suffered or contracted before or during (but did not arise out of) the person's relevant service." This wording can be a trap if claimants or advisers fail to appreciate that where an illness is asserted to have "arisen out of" service, the instrument’s pathway for material contribution or aggravation via s 9 may not be available. That requires careful factual framing in claims.

Death linkage requires contribution to terminal event

• For death claims, s 7(3) requires that the terminal event or condition "was contributed to by the person's chronic multisymptom illness." The Schedule lists certain terminal events (pneumonia, respiratory failure, cardiac arrest, circulatory failure, cessation of brain function) as included examples. Claimants will need evidence that links the decedent’s CMI to the terminal event as a contributing factor, not merely co‑existence.

Interactional complexity with service categories

• The Schedule’s definition of "relevant service" excludes certain service types by reference. In practice, claimants whose service is characterised as operational service, hazardous service, or British nuclear test defence service may find this instrument inapplicable depending on the statutory meanings in the VEA and MRCA. Advisers must check whether the claimant’s service falls within the Schedule’s categories.

No guidance on proof of the causation factor

• The instrument’s silence on what evidence will satisfy "inability to obtain appropriate clinical management" produces uncertainty about what documentary or testimonial materials will be adequate. This lacuna increases the risk of adverse findings on causation if claimants fail to anticipate and document the kinds of barriers they encountered when attempting to obtain management.

No procedural detail or burden allocation

• The instrument does not specify who bears the burden of proof in relation to particular elements beyond the general balance‑of‑probabilities framing of the RMA’s view in s 8. Administrative practice, tribunal rules, and case law outside this instrument will determine how burdens are allocated and what procedural steps are required.

For claimants and advisers: evidence checklist (directly tied to instrument requirements)

1. Specialist diagnosis: obtain a written diagnosis from a specialist physician or a psychiatrist that expressly states the diagnosis of chronic multisymptom illness and addresses how the diagnostic criteria in s 7(2) are met. The report should explicitly link the patient’s symptoms to the three required elements: symptom categories, functional disruption, and six months’ persistence.

2. Symptom mapping: ensure the specialist report enumerates current symptoms and maps them to the instrument’s three categories: fatigue; mood‑cognition (examples include feeling depressed, difficulty remembering or concentrating, feeling moody, feeling anxious, trouble finding words, difficulty sleeping); musculoskeletal (joint pain, joint stiffness, muscle pain) (s 7(2)(1)(i)-(iii)). The report should state which symptoms are current at the time of assessment.

3. Functional impact evidence: obtain objective or corroborative evidence demonstrating "significant disruption of social and occupational functioning" (s 7(2)(B)). This could include occupational assessments, employer statements, incapacity or functional capacity evaluations, rehabilitation reports, and social support assessments that show the effect of symptoms on daily living and work.

4. Duration documentation: compile medical records showing the symptoms have persisted for at least six consecutive months (s 7(2)(C)). Chronologies, contemporaneous clinical notes, pharmacy records, and dates of consultations will assist in proving continuity.

5. Evidence on the causation factor: because s 9 requires showing "inability to obtain appropriate clinical management", assemble records evidencing attempts to obtain care and barriers encountered. Possible documents include referrals, appointment histories, specialist wait‑list information, correspondence refusing treatment, geographic or access evidence, insurance or administrative denials, and contemporaneous notes from treating clinicians commenting on lack of access or suboptimal management. The instrument does not define the necessary evidence, so the objective should be to show clearly and contemporaneously why appropriate care was not received.

6. Service documentation: gather service records that establish the claimant’s status as having "relevant service" under the Schedule (Schedule, item 1). Because the Schedule excludes some service types from "relevant service", advisers must confirm the exact character of the claimant’s service in VEA or MRCA terms and provide service records, discharge documentation, and other administrative proof.

7. For death claims: obtain medical records and, if available, a post‑mortem or specialist opinion linking the decedent’s CMI to the terminal event. The evidence must show that CMI contributed to the proximate or ultimate cause of death (s 7(3); Schedule, "terminal event").

Practical steps for litigation or review preparation

• Address the undefined elements early. Since "inability to obtain appropriate clinical management" is dispositive, a claimant should compile detailed, contemporaneous evidence of attempts to access care and reasons for failure to obtain appropriate management. Anticipate that decision makers will want to know why treatment was not obtained and whether the lack of treatment was causally linked to the course of illness or its aggravation.

• Secure specialist cooperation. The instrument makes specialist diagnosis central. Obtain reports that are framed in terms the instrument uses. Ask specialists explicitly to address the s 7(2) elements and, where relevant, to comment on whether the patient’s inability to obtain particular management options affected the course of illness.

• Prepare medical chronologies and functional assessments. Because the instrument requires both symptom duration and significant functional disruption, chronological timelines of symptom onset, escalation, treatment attempts, and functional decline will help adjudicators apply the instrument’s criteria.

• Check service characterisation under the VEA and MRCA. The Schedule ties the instrument’s operation to specific service categories. Before relying on the instrument, confirm that the claimant’s service fits within the defined "relevant service" categories and assemble authoritative service records.

Administrative practice and procedural tips

• Present reports that cross‑reference the instrument. Where possible, have specialists and other experts explicitly address the instrument’s language in their reports so that decision makers can readily apply s 7(2), s 9 and s 10 without extrapolating from general medical opinion.

• Anticipate requests for further information. Because the instrument leaves key terms undefined, decision makers may request further particulars or clarification. Respond promptly with additional specialist evidence, explanations of attempts to access management, and any new medical documentation.

• Where claims are denied under this instrument, treat the denial as a procedural determinative decision that may be appealable under the statutory processes provided by the VEA or MRCA. The instrument does not itself set appeal routes, so refer to the governing Acts for review procedures.

Adviser caution points

• Avoid assuming the instrument applies in all service contexts. Confirm the claimant’s service falls within the Schedule’s definition of "relevant service" and be prepared to show it.

• Do not rely on general practitioner reports alone to satisfy the diagnosis requirement. The instrument mandates a specialist physician or psychiatrist diagnosis (s 7(2)).

• Carefully document the chronology and nature of attempts to obtain management. Because s 9 is both mandatory and undefined, absence of contemporaneous evidence showing inability to obtain appropriate management risks a finding that the required factor does not exist.

Concluding compliance observation

• The instrument sets substantive medical and causal thresholds. Meeting those thresholds requires deliberate evidentiary preparation focused on specialist diagnosis, symptom duration and impact, proof of attempts to obtain appropriate clinical management, and documentary proof of relevant service. The instrument itself does not provide procedural detail; compliance therefore depends on aligning documentary evidence with the instrument’s language and on following the procedural rules of the VEA or MRCA claims process to which s 5 refers.