The Act primarily affects participants in the construction supply chain in Victoria. "Claimants" are persons who serve a payment claim under s.14 – typically head contractors, subcontractors, suppliers of materials, or providers of architectural, design, surveying, or engineering services (ss.4, 6). "Respondents" are persons on whom a payment claim is served – usually the party higher in the chain who engaged the claimant (s.4).

"Construction work" is broadly defined in s.5(1) to include construction, alteration, repair, maintenance, extension, demolition or dismantling of buildings, structures or works forming part of land; installation of fittings; cleaning carried out in the course of such work; operations integral to or preparatory to such work (site clearance, excavation, scaffolding, prefabrication, landscaping); painting; and any prescribed work. It excludes oil or gas extraction, mineral extraction, and prescribed work (s.5(2)). "Related goods and services" (s.6) covers materials or plant for incorporation or use in construction work, labour, architectural/design/surveying/quantity surveying services, decoration or landscape advisory services, and prescribed items, but excludes prescribed exclusions. A "construction contract" is any contract or arrangement under which one party undertakes to carry out construction work or supply related goods and services for another (s.4).

The Act therefore captures the entire vertical supply chain: principals, head contractors, subcontractors, sub-subcontractors, material suppliers, labour hire firms, consultants. It does not apply to employees (s.7(3)(a)), domestic building contracts between builders and ordinary building owners under the Domestic Building Contracts Act 1995 (s.7(2)(b)), or contracts for work on residences that are not part of a business of building residences or incidental to another construction contract (s.7(2)(ba)). Financiers providing loans, guarantees or indemnities are protected (s.7(2)(a), (3)(b)-(c)).

Authorised nominating authorities (ANAs) authorised by the Authority under s.42, adjudicators and review adjudicators appointed by them (ss.19-20, 28G), and the Authority itself (Part 3A) are directly regulated. The Authority maintains the register (s.47B), records and publishes de-identified determinations (s.47C), and may impose conditions on ANAs (s.43). Adjudicators must be natural persons with prescribed qualifications and must not be parties, employees of parties, or otherwise ineligible (s.19).

Principals (as defined in s.29A and s.31) higher in the chain can be drawn into the regime when a claimant obtains a debt certificate and serves a notice of claim, triggering an assignment of the principal's debt to the respondent (s.34). The Crown is bound (s.8).

Because the Act applies regardless of the contract's governing law (s.7(1)) and to oral contracts, it affects any party performing construction work or supplying related goods and services with a sufficient territorial connection to Victoria. It does not apply to contracts entered before commencement (s.7(6)) or to prescribed classes (s.7(5)).

Claimants enjoy a statutory right to progress payments on each reference date (s.9(1)), including final, single, one-off or milestone payments (s.4 definition of progress payment). They may serve payment claims that identify the work, state the claimed amount, declare they are made under the Act, and must not include excluded amounts (s.14). Claimants may include previously claimed but unpaid amounts (s.14(9)) and may recover unpaid claimed or scheduled amounts as a debt, apply for adjudication, or suspend work after notice (ss.16, 17, 29). They hold a lien over unfixed plant or materials (s.12A) and may recover from principals via assignment (Division 4).

Respondents must provide a payment schedule within the earlier of the contract time or 10 business days, identifying the claim, stating the scheduled amount, identifying any excluded amounts, and giving reasons for any withholding (s.15). Failure to do so renders them liable for the full claimed amount and prevents them from contesting the debt in subsequent recovery proceedings (ss.16(4), 17(4)). If an adjudication occurs, respondents may lodge an adjudication response only if they served a timely schedule (s.21(2A)), must identify relevant principals (s.21(2)(c)), and must pay any non-excluded adjudicated amount before seeking review (s.28B(5)).

Adjudicators and review adjudicators must determine applications expeditiously, consider only the matters listed in s.23(2) or s.28I(2), exclude excluded amounts (ss.23(2A), 28I(3)), give written reasons (s.23(3), s.28I(7)), and correct slips (ss.24, 28L). They enjoy immunity for good-faith acts (s.46). ANAs must nominate eligible adjudicators, refer applications promptly, provide information to the Authority, and charge only guideline-compliant fees (ss.42-43C).

All parties are prohibited from contracting out (s.48). Claimants who suspend work in accordance with the Act are not in breach and are protected from liability for losses caused by the suspension (s.29(3), (5)); respondents must compensate claimants for losses caused by removal of work (s.29(4)). Principals served with a notice of claim must pay the assigned debt directly and enjoy a statutory defence only for matters arising before service of the notice (s.38(4)).

Interest runs at the greater of the Penalty Interest Rates Act 1983 rate or the contract rate (s.12(2)). Confidentiality obligations bind the Authority and its staff (s.49). The Supreme Court's jurisdiction is limited in the manner declared in s.51 to satisfy Constitution Act 1975 s.85.

The Act creates few direct criminal offences. The principal offence appears in s.41(2): a respondent who, on demand, gives a notice under that section knowing it to be false or misleading in a material particular is liable to 60 penalty units. Enforcement of payment obligations is overwhelmingly civil.

Failure to pay a claimed amount where no schedule was served allows the claimant to recover the debt in court without the respondent being permitted to raise contract defences or cross-claims (s.16(4)). Similar restrictions apply where a scheduled amount is not paid (s.17(4)). Adjudication determinations are enforced via adjudication certificates filed under s.28R; the court must enter judgment for the unpaid portion once satisfied the statutory preconditions exist, again barring cross-claims and contract defences (s.28R(5)). A limited exception permits challenge where the adjudicator took into account a non-claimable variation (s.28R(6)).

Suspension rights (s.29) and the lien (s.12A) provide self-help remedies. The principal-recovery mechanism in Division 4 allows a claimant with a judgment debt to obtain a debt certificate (s.33), serve a notice of claim that operates as an assignment (s.34), and sue the principal directly if the principal fails to pay (s.38). Priority between competing assignees is determined by order of service of notices, with a seven-day deemed simultaneous service rule and pro-rata distribution (s.36).

Review determinations can require repayment by a claimant to a respondent (s.28I(6)(d)). Failure to pay a review-determined amount allows the other party to obtain an adjudication certificate (ss.28P, 28Q). Interest is added to adjudicated amounts (s.23(1)(c), s.28I(6)(e)).

The Authority may withdraw an ANA's authority or impose, vary or revoke conditions (ss.42, 43), with appeal rights to the Building Appeals Board noted in the text. Adjudicators who fail to determine within time forfeit fees unless exceptions apply (s.45(5)-(6)).

The Act expressly preserves other rights. Section 3(4) states it does not limit contractual entitlements or other remedies. Section 47(1) provides that nothing in Part 3 affects rights under the contract, under Part 2, or at law. Courts and arbitrators must allow for amounts paid under the Act in any order but may order restitution (s.47(3)-(4)).

It interacts with the Domestic Building Contracts Act 1995 by excluding most domestic building contracts (s.7(2)(b)-(ba)). It carves out financing arrangements that would otherwise fall under the Banking Act 1959 (Cth) definitions used in the recognised-financial-institution definition (s.4).

The Act amends the operation of the Constitution Act 1975 by limiting Supreme Court jurisdiction in the manner stated in s.51 for ss.46 and 28R. It interacts with the Building Act 1993 by constituting the Victorian Building Authority as the responsible body (s.4 definition of Authority), conferring functions under Part 3A, and providing appeal rights to the Building Appeals Board.

Service of notices is governed by s.50, which supplements general service rules. Regulations may prescribe forms, information, exemptions and fees (s.52). The Interpretation of Legislation Act 1984 applies to style, headings, examples and punctuation as noted in the endnotes.

The Act overrides contrary contractual provisions (s.48) but does not affect the law of assignment outside Division 4. It interacts with the Penalty Interest Rates Act 1983 by adopting its rate as a floor for interest (s.12(2)(a)).

Transitional provisions in s.53 provide that the 2006 amendments do not apply to payment claims under contracts entered before the relevant commencement; such claims are dealt with under the pre-amendment Act.

The version incorporated as at 1 February 2024 reflects the Building Legislation Amendment Act 2023 (No. 11/2023), which amended s.49 with effect from that date to update confidentiality obligations by reference to specific subdivisions of the Building Act 1993. Earlier, the Building and Planning Legislation Amendment (Governance and Other Matters) Act 2013 (No. 34/2013) substituted references to the former Building Commission with the Victorian Building Authority, updated definitions, and adjusted administrative provisions (e.g. ss.4, 20(4), 23A, 24(3), 28D(5), 28G(4), 28J(c), 42-43, 43A(g), 47A, 47B, 47C, 49).

The most substantive changes occurred via the Building and Construction Industry Security of Payment (Amendment) Act 2006 (No. 42/2006), which commenced on 30 March 2007. That Act substituted the original s.14, inserted ss.10A, 10B, 12A, 23A, 28A-28L, 28M-28R, 29A, 43A-43C, 47A-47C; rewrote adjudication response, procedure and determination rules; introduced the review mechanism; tightened excluded-amount rules; added the trust-account regime; expanded principal-recovery provisions; strengthened the no-contracting-out rule; and aligned the object clause with the new procedures. These changes were made to address perceived weaknesses in the original 2002 regime – in particular, lack of review of adjudication decisions, uncertainty about variations and set-offs, and insufficient protection against phoenixing or insolvency higher in the chain.

The amendments reflect a policy shift toward greater procedural rigour, protection against inclusion of disputed variation or damages claims in progress payments, and enhanced transparency through publication of de-identified determinations. The 2023 change to s.49 simply updates cross-references following further Building Act reforms, ensuring confidentiality obligations remain aligned with the Authority's broader information-handling regime.

The source text does not contain specific court decisions. However, the structure of the Act itself anticipates certain controversies. Section 23(2B) expressly provides that an adjudicator's determination is void to the extent it contravenes the limited matters the adjudicator may consider or takes excluded amounts into account. Section 28I(4) contains a parallel provision for review determinations. These provisions reflect legislative recognition that determinations exceeding jurisdiction or relying on prohibited matters will be challenged.

Section 28R(5) and (6) limit the grounds on which a judgment debtor may seek to set aside an enforcement judgment, barring contract-based defences and challenges to the determination itself except where a non-claimable variation was taken into account. This has the effect of channeling most disputes about the underlying contract into separate proceedings, while preserving the interim cash-flow purpose of the Act (s.47).

The review threshold in s.28A ($100,000 or prescribed amount) and the strict preconditions in ss.28B and 28C create scope for argument about whether an application meets the "excluded amount" ground or whether the 10% threshold in s.10A(4) has been crossed. The example in s.10A(4) itself illustrates legislative intent to prevent serial disputed variations on larger contracts.

The principal-recovery provisions (Division 4) raise questions of priority (s.36), the effect of stays (s.37), and when an assignment ceases (s.39). The statutory assignment operates at law (s.38(1)) but is limited to the certified debt and subject to prior assignments.

Adjudicator immunity (s.46) and the prohibition on contracting out (s.48) are likely to be strictly construed. The text notes that guidelines issued under s.44 must be published in the Government Gazette, implying that failure to follow them could ground administrative-law challenge to ANA authorisations or conditions.

The confidentiality provision (s.49, as amended in 2023) limits use or disclosure by the Authority, Commissioners, CEO and staff to functions under the Act or specified Building Act provisions, reflecting ongoing tension between transparency (s.47C) and commercial sensitivity.

Most practitioners realise the Act creates a "pay now, argue later" regime, but few appreciate how narrowly the adjudicator's consideration is confined. Section 23(2) permits regard only to the Act, the contract, the claim, the schedule (and submissions), and inspection results. Section 23(2A)-(2B) voids any determination that considers excluded amounts or other prohibited matters. The identical constraint appears in s.28I for reviews. This means an adjudicator who even considers a set-off for delay damages (an excluded amount under s.10B(2)(b)) risks rendering the determination void to that extent.

The claimable-variation regime in s.10A is a trap. The second class requires either a contract value of $5 million or less or no dispute-resolution clause if over that amount; once the cumulative claimed disputed variations exceed 10% of the original contract sum, the threshold drops to $150,000. The example in the section itself demonstrates how a $3 million contract with a dispute-resolution clause can render later disputed variations non-claimable once the 10% threshold is crossed. Many claimants inadvertently include non-claimable variations and thereby taint the entire payment claim.

Section 14(8) prohibits more than one payment claim per reference date, but s.14(9) allows inclusion of previously claimed but unpaid amounts. The distinction is subtle and frequently litigated in practice. Similarly, the "once and for all" rule for final claims in s.14(6)-(7) means that serving a final claim without first having made a contractual claim that went unpaid can bar any further claim under the Act.

The review mechanism (Division 2A) contains multiple cumulative preconditions. A respondent cannot even apply unless the excluded amount was flagged in the schedule or response, the non-excluded adjudicated amount has been paid, and the excluded portion has been paid into a designated trust account (s.28B). Failure on any precondition is fatal. Claimants seeking review must show the adjudicator wrongly classified an amount as excluded (s.28C). The short 5-business-day window in s.28D(2) is unforgiving.

The lien in s.12A requires a prescribed-form notice before exercise and is extinguished on payment; it yields to any pre-existing lien or charge and gives no rights against third-party owners. Many subcontractors overlook the notice requirement and lose the remedy.

Division 4 principal recovery is powerful but procedurally onerous. A debt certificate can only issue after judgment (s.33); the notice of claim must be in prescribed form and accompanied by the certificate; the assignment is limited to the certified debt and takes priority by service order. The 7-day deemed simultaneous service rule and pro-rata distribution (s.36) can produce unexpected outcomes when multiple claimants serve within the same week. A principal who receives a stay under s.37 is relieved from the payment obligation for the stay period.

Adjudicators forfeit fees if they miss the 10-business-day (or extended) deadline unless the application is withdrawn or settled (s.45(5)). The exception for refusing to deliver until fees are paid is narrow. Parties who deliberately withhold consent to extension under s.22(4A) or s.28I(11) (which prohibits unreasonable withholding) risk costs arguments or adverse findings under s.28I(8) that the review was not made in good faith.

Finally, the transitional provision (s.53) means that contracts entered before 30 March 2007 continue under the unamended 2002 regime. Many older head contracts still govern long-running projects; practitioners must check the contract date before assuming the current adjudication-review and excluded-amount rules apply.

Compliance begins with contract drafting. drafters should avoid any clause that could be characterised as a "pay when paid" provision under s.13(2). Reference dates should be expressly stated to avoid the default 20-business-day rule in s.9(2)(b). Payment terms should align with the 10-business-day statutory due date in s.12(1)(b) where possible. Clauses purporting to exclude the Act are void (s.48).

Claimants should:

• Maintain accurate records of reference dates.
• Use the prescribed form (if any) and include all mandatory statements in payment claims (s.14(2)).
• Exclude all amounts falling within s.10B.
• Serve only one claim per reference date (s.14(8)).
• Where a final claim is intended, ensure a prior contractual claim has been made and unpaid if relying on s.14(7).
• When suspending, give exactly the notice required by s.16, 17 or 28O and wait three business days (s.29(1)).
• When seeking principal recovery, first obtain judgment and a debt certificate (ss.30, 33).

Respondents must reply to every payment claim with a schedule within the earlier of the contractual time or 10 business days (s.15(4)). The schedule must identify excluded amounts expressly (s.15(2)(c)) if reliance is to be placed on them later in review. Payment of the scheduled amount by the due date avoids adjudication exposure. Where adjudication is inevitable, the response must be lodged within the later of 5 business days after the application or 2 business days after notice of acceptance (s.21(1)), and must not introduce new reasons unless the adjudicator serves a notice under s.21(2B) giving the claimant two further business days.

Both parties should:

• Check adjudicator eligibility (s.19) and ANA authority (s.42).
• Comply strictly with all time limits; the Act is unforgiving.
• When paying into a designated trust account for review, give immediate notice with particulars (s.28F(1)).
• Retain all submissions, photographs and records for potential court enforcement proceedings.

ANAs and adjudicators must follow the Ministerial guidelines published in the Government Gazette (s.44), provide information to the Authority (s.43B), and observe the publication and de-identification rules when determinations are lodged (s.47C).

Principals served with a notice of claim must redirect payments to the claimant and keep records of prior assignments. They may seek a stay under s.37 if proceedings against the respondent are already on foot.

All parties should maintain separate files for "Act" claims versus contractual claims, because amounts paid under the Act must be taken into account in any later arbitration or litigation (s.47(3)-(4)), with possible restitution orders.

Regular training on the differences between the pre- and post-2007 regimes is essential for organisations with legacy contracts. Software systems should flag reference dates, automatically generate compliant payment claims and schedules, and diary all 2-, 5-, 10- and 20-business-day deadlines. Compliance checklists referencing each substantive section (ss.9-15, 18-24, 28A-28R, 29, 32-41) should be used on every project.

By treating the Act as a statutory overlay that cannot be contracted out of, by observing every procedural precondition, and by maintaining meticulous contemporaneous records, participants can minimise the risk of void determinations, forfeited fees, lost liens, or personal liability under the false-notice offence in s.41(2). The regime rewards those who master its technicalities; it punishes those who treat it as ordinary contract administration.