Notice and time bars

The framing question is always the same: is the notice provision a condition precedent, so that non-compliance forfeits the entitlement outright, or is it merely procedural, so that non-compliance sounds in something less than forfeiture? Nothing else in extension of time practice turns a meritorious claim into a dead one so quickly. It is the third of the four elements of an extension of time claim, and by a distance the cheapest to get right.

What follows is the mechanism, the comparison across the seven form families in common use, and the two places where the answer is currently moving: Australian security of payment statutes, and the deemed-acceptance provisions that most commentary overlooks.

Is the notice clause a condition precedent, or only procedure?

A notice clause bars a claim only if, on its true construction, the entitlement is made conditional on the notice. That is the whole test in English law. The current leading statement is Disclosure and Barring Service v Tata Consultancy Services Ltd [2025] EWCA Civ 380 (Coulson, Lewison and Snowden LJJ, 4 April 2025), and it is materially more permissive than the formulation practitioners grew up with.

Coulson LJ's five factors:

1. It depends on "the precise words used and their contractual context".
2. There must be something making the relief conditional on the requirement.
3. Clear language is normally needed, but the label "condition precedent" is not required.
4. Conditional language such as "shall" links the steps but is not by itself sufficient.
5. A precise time limit is not essential, "promptly" or "within a reasonable time" can suffice.

Point 5 is the development. It removes the argument, commonly pleaded until 2025, that a notice clause without a hard deadline cannot be a condition precedent. Note also which way it ran in DBS v TCS: the clause bound the employer, which failed to issue Non-conformance Reports "promptly" and recovered nothing in Delay Payments. The doctrine is not one-directional.

Two older English authorities still do real work. Steria Ltd v Sigma Wireless Communications Ltd [2007] EWHC 3454 (TCC) held that "provided that" plus a clear temporal requirement creates a condition precedent without the magic words and without an express statement of consequence: and, separately, that the notice must emanate from the party claiming, so minutes recorded by a third party will not do. Multiplex Constructions (UK) Ltd v Honeywell Control Systems Ltd (No 2) [2007] EWHC 447 (TCC) supplies the standard judicial answer to the unfairness objection: notice provisions "serve a valuable purpose": investigation while the facts are fresh, and the opportunity to withdraw the instruction.

The original formulation, from Bremer Handelsgesellschaft mbH v Vanden Avenne-Izegem PVBA [1978] 2 Lloyd's Rep 109 (HL), required the clause to state a precise time and to make plain that failure forfeits the entitlement. Treat that as the safe drafting target, not as the threshold a clause must clear to bite.

The three philosophies the standard forms embody

Standard forms are not merely different in the length of the notice period. They embody three incompatible designs. JCT 2024 has no deadline, no forfeiture and no deemed grant, with discretion sitting with the assessor throughout. NEC4 and FIDIC 2017 have a hard deadline and express forfeiture, but also a self-healing mechanism. FIDIC 1999, CCDC 2 – 2020 and AIA A201–2017 have the deadline and the forfeiture with no safety valve at all, and those are the forms on which claims most often die procedurally. Every table in this article states form-default positions: bespoke amendment to notice provisions is normal on major projects, and the executed contract governs.

Form-default clause machinery. The condition-precedent column is the corpus's reading of how each form is treated in practice. Bespoke amendment is normal, and the executed contract governs.

Two honesty notes on that table. First, AS 4000:2025 is paywalled and was not read for this corpus. The 2025 edition softens the delay-notice trigger from "promptly" to "as soon as reasonably practicable", but the EOT claim period under the 2025 edition was not verified, and the clause numbering in the 2025 edition is itself disputed between reputable secondary sources. The 28-day figure in the row above belongs to the 1997 edition. Do not carry it into a 2025-form analysis without checking the standard. Second, these are form-default positions only. Bespoke amendment is the norm on major projects, and employer amendments routinely convert a non-condition-precedent notice into a condition precedent, most commonly by bolting a fixed period and words of forfeiture onto JCT DB cl 2.24 or SBC cl 2.27. After DBS v TCS such a bespoke clause will bite even without the hard deadline. Never analyse a JCT notice question from the printed form.

Why deemed acceptance matters more than the length of the period

The differentiator between the forms is not 21 days versus 28 versus 8 weeks. It is whether the clause protects the claimant against an inattentive assessor. NEC4 clause 61.4 treats a compensation event notification as accepted if the Project Manager stays silent for one week. FIDIC 2017 Sub-Clause 20.2.2 requires the Engineer to say, with reasons and within 14 days, that it considers a Notice of Claim late, failing which the Notice is deemed valid. Neither mechanism exists in FIDIC 1999, in JCT 2024, in CCDC 2 – 2020 or in AIA A201–2017.

Form-default. Deadlines and deeming mechanisms are read off the published forms. Bespoke amendment is normal on major projects, and the executed contract governs.

The practical consequence: on a FIDIC 2017 or NEC4 project, an Engineer or Project Manager who simply ignores a claim hands the claimant a procedural advantage. On a FIDIC 1999, CCDC or AIA project, silence costs the assessor nothing. That asymmetry is why the 20.2.2 deeming provision is the single most contractor-favourable feature of the 2017 claims regime (and why it is routinely deleted by employer amendment in the Special Provisions) the defined term in the Red Book 2017, though some published texts of the form use "Particular Conditions", so check the printed form. Check for that deletion before advising on any 2017 claim.

Under NEC4 there is a second trap inside the safety valve. The deemed acceptance of a quotation under cl 62.6 does not arise automatically. It arises only after the Contractor notifies the Project Manager's failure. A contractor that waits for the deeming to operate by itself waits forever.

Where the clock starts, and why CCDC 2 – 2020 runs earliest

Trigger dates differ more consequentially than periods do. CCDC 2 – 2020 GC 6.5.4 carries the earliest-running trigger of the forms compared here, because the 10 Working Days run from the commencement of the delay, not from awareness of it: "No extension shall be made for delay unless Notice in Writing of the cause of delay is given to the Consultant not later than 10 Working Days after the commencement of the delay." A contractor can be time-barred before it knew there was anything to notify.

Compare the alternatives. FIDIC 2017 Sub-Clause 20.2.1 runs from awareness "or when the Party should have become aware". NEC4 cl 61.3 runs from when the Contractor becomes aware of the event. JCT DB 2024 cl 2.24.1 runs from when delay becomes "reasonably apparent". Only CCDC runs from an objective event that may be invisible at the time. "Working Days" is a defined term excluding Saturdays, Sundays and holidays, so the calendar window is roughly two weeks, which sounds generous until the trigger point is applied to it.

Elite Construction Inc. v Canada (Attorney General), 2021 ONSC 562, is the case that makes the point. A CAD 4.1M delay and extras claim was dismissed on summary judgment for failure to give written notice within 10 working days of the neglect or delay. The decision was affirmed on appeal, and the Court of Appeal reaffirmed that notice compliance is a condition precedent to maintaining a claim in the courts, but the Court of Appeal's neutral citation is unverified in this corpus and is therefore not given here. Cite the ONSC decision.

Canadian law is the strictest of the five jurisdictions surveyed here. Corpex (1977) Inc. v The Queen in right of Canada, 1982 CanLII 213 (SCC), holds that a notice provision can bar a claim even without express "failing which" language. Technicore Underground Inc. v Toronto (City), 2012 ONCA 597, holds that the owner need not prove prejudice. Northland Kaska Corp. v R., 2001 BCSC 929, supplies the line worth memorising: "the grumblings of a contractor are not sufficient to constitute notice."

At the other end of the range, AIA A201–2017 §15.1.3.1 is more generous than it is usually described. The 21 days run from "occurrence of the event giving rise to such Claim or within 21 days after the claimant first recognizes the condition giving rise to the Claim, whichever is later." The "whichever is later" limb is routinely dropped from summaries of the clause, and it is the limb that saves latent-condition and cumulative-impact claims. §15.1.3.2 goes further: for conditions first arising after the one-year correction period there is no 21-day limit and no referral to the Initial Decision Maker.

FIDIC has its own soft start. Obrascon Huarte Lain SA v HM Attorney General for Gibraltar [2014] EWHC 1028 (TCC), affirmed [2015] EWCA Civ 712, held that under FIDIC 1999 Sub-Clause 20.1 the 28 days runs from when the contractor was, or should have been, aware that the works is or will be delayed, and that notice may be given prospectively, when it is clear delay will occur, or retrospectively, when delay has begun, whichever the contractor elects. A strict bar with a generous start date. It is the contractor's best structural argument on FIDIC timing and it is frequently overlooked.

What the US layer adds: administrative notice and cost cut-offs

United States federal practice is structurally different from the common-law norm, and the difference is favourable to contractors on entitlement and unfavourable on money. FAR 52.249-10(b)(1)'s 10 days is administrative, not a forfeiture: the Contracting Officer has express power to extend it, and under (b)(2) the CO ascertains the facts and the extent of the delay and extends the time, with findings of fact final and conclusive subject to appeal under the Disputes clause.

The FAR's real teeth are elsewhere. FAR 52.242-14(c) (Suspension of Work) and FAR 52.243-4(d) (Changes) are cost cut-offs, not entitlement bars: they permit no adjustment for costs incurred more than 20 days before the written notice. They do not kill the claim. They shrink it, silently, by whatever the contractor spent before it wrote the letter. Both carry a final-payment backstop: FAR 52.243-4(f) permits no proposal after final payment, and 52.242-14(c) requires the claim to be asserted not later than final payment. Those two provisions are the quiet killers of otherwise good federal delay claims.

FAR 52.243-4(b) adds a gateway of a different kind. An order not issued as a formal change order is treated as a change order only if the Contractor gives written notice stating "the date, circumstances, and source of the order" and that it regards the order as a change order. Without that notice there is no constructive change to argue about. FAR 52.243-4(e) then requires the right to an adjustment to be asserted within 30 days of the change order or the (b) notice.

Behind all of it sits the Contract Disputes Act six-year bar under FAR 33.206, running from accrual, and accrual runs from the impact, not from the eventual quantification. Watts Constructors, LLC, ASBCA 63753 (25 September 2025): the six-year bar killed a delay claim about a tardy modification because the contractor knew of the impact when it occurred.

On the private-work side, AIA A201–2017 §1.6.2 is the easiest own goal in US practice. Notice of a Claim, unlike ordinary notices under §1.6.1 which may be electronic, is duly served only if delivered by certified or registered mail, or by a courier providing proof of delivery. An email that satisfies every other notice provision in the contract does not serve a Claim, and §15.1.1 expressly defines a Claim to include "a change in the Contract Time", so every time request is a Claim. Actual owner knowledge does not cure it.

One thing US notice does not buy: Amatea/Grimberg JV v Secretary of the Navy, No. 24-1006 (Fed. Cir., 25 June 2025) (nonprecedential), holds that a Contracting Officer's grant of a time extension and release of liquidated damages does not establish excusable delay for the contractor's own affirmative claim. Perfect notice and an administrative extension still leave the contractor to prove excusable critical-path delay from scratch, on the strength of its contemporaneous records.

Can a statute strike out a time bar as unfair?

In two Australian jurisdictions, yes, and nowhere else in the common-law world covered by this corpus. Section 13A of the Building and Construction Industry Security of Payment Act 2002 (Vic), commenced 15 April 2026, allows a notice-based time bar to be declared unfair and of no effect where compliance "is not reasonably possible" or "would be unreasonably onerous". Western Australia's section 16 of the Building and Construction Industry (Security of Payment) Act 2021 (WA) applies the same test to contracts entered on or after 1 August 2022.

Four features of the Victorian provision make it the most significant recent development in extension of time notice practice anywhere:

• It expressly reaches extensions of time. A "notice-based time bar" is any provision making contingent on notice an entitlement to payment, "an extension of time for doing a thing that affects an entitlement" to payment or to release of performance security, or release of performance security. EOT notice provisions are caught where the extension affects a payment or security entitlement.
• It is retrospective to all construction contracts, including those entered into before commencement.
• It is not confined to adjudication. An adjudicator, a court, an arbitrator or an expert determiner may decide the question. It therefore reaches conventional arbitration and litigation of EOT claims, which is unusual for a security of payment provision.
• The mandatory considerations under s. 13A(5) cut both ways. When the party would reasonably have become aware of the deadline, when and how notice must be given, the parties' relative bargaining power, a presumption that the parties understood the terms, and a presumption that the notice-giver has the commercial and technical competence of a reasonably competent contractor. Subcontractors on principal-drafted terms have the strongest case. "We were too busy building" is not "not reasonably possible".

There is no case law anywhere on either provision. No Victorian determination under s. 13A has been reported, and (the more telling gap) no Western Australian case law has applied or tested s. 16 in the four years it has been in force. Victorian practitioners therefore have no interpretive guidance at all on a provision retrospectively applied to every construction contract in the state. Expect the first boundaries to be set at adjudication rather than in court.

Two qualifications must travel with any advice on s. 13A. Commentary flags a drafting gap: the definition of "notice" does not expressly include notice of an event occurring, arguably leaving a class of pure event-notification clauses outside the section. That is untested. And the transitional carve-out is recorded as a conflict in this corpus: one reputable firm describes payment claims and adjudication applications pending determination before 15 April 2026 as unaffected, another describes payment claims served before that date as unaffected. Those are close but not identical, and the transitional provision itself should be read before relying on either.

Elsewhere in Australia the position is unchanged. New South Wales has no unfair-time-bar power. The anti-contracting-out provision in s. 34 of the Building and Construction Industry Security of Payment Act 1999 (NSW) is the relevant lever, and on its face it addresses the effect of time bars on security of payment rights rather than EOT time bars generally. For Queensland, this corpus could not confirm the existence of a WA or Victorian-style power under the Building Industry Fairness (Security of Payment) Act 2017 (Qld). The working assumption is that there is none, and that assumption should be verified before it is relied on.

Note also what statutory adjudication does not do. In Ontario, the Construction Act and O. Reg. 264/25, s. 19 permit adjudication of an extension of time only as a supporting matter reasonably necessary to resolve a prescribed payment dispute. A contractor cannot commence a freestanding adjudication for a declaration of time entitlement, and adjudication does not reopen a contractual notice bar.

What rescues a late notice, and why the rescues are worth less than parties expect

Every rescue route is fact-heavy, and none is reliable enough to plan around. The realistic assessment, route by route:

• Waiver and estoppel. Needs owner conduct inconsistent with reliance on the bar, the paradigm being repeated payment of unnoticed claims, as in Colautti Construction Ltd v Ottawa (City), 1984 CanLII 1969 (ONCA). Usually produces a triable issue rather than a win.
• Actual knowledge. Rarely enough on its own, because the notice must emanate from the claimant (Steria, 2007) and because "the grumblings of a contractor are not sufficient" (Northland Kaska, 2001 BCSC 929).
• No prejudice to the owner. Not a defence in Canada at all: Technicore Underground Inc. v Toronto (City), 2012 ONCA 597.
• Prevention and time at large. The argument in Gaymark Investments Pty Ltd v Walter Construction Group Ltd (1999) 16 BCL 449 (NTSC). In Multiplex v Honeywell (No 2) [2007] EWHC 447 (TCC), Jackson J saw "considerable force" in the criticisms of Gaymark. English law does not accept that a contractor's failure to serve a condition-precedent notice sets time at large. Doubted in Australia. Weak.
• Civil-law good faith and abuse of rights. Available under the UAE and Saudi codes, but unreliable, and the 2023–2026 trend is toward enforcement. Note that Saudi Arabia's Civil Transactions Law (Royal Decree M/191, in force 16 December 2023) art. 470 imposes an additional statutory duty of immediate notification operating alongside FIDIC's 28 days. A trap, not a rescue, because a contractor can satisfy Sub-Clause 20.2.1 and still fall foul of art. 470.

The case that should end the argument is Panther Real Estate Development LLC v Modern Executive Systems Contracting LLC [2022] DIFC CA 016 (judgment 12 May 2023). The FIDIC 28-day notice was held a clear condition precedent, not waivable by subsequent performance or by employer fault, and good faith arguments were rejected on the basis that the contractor was a willing party to a contract containing clear notice requirements. The contractor lost its extension of time entitlement despite the employer having caused 304 of 325 days of delay. That number is the whole argument for serving a notice you think you do not need. (The limitation that travels with Panther: the DIFC is a common-law free zone applying DIFC law, not the onshore UAE Civil Code, so the decision is highly persuasive commercially but is not authority on how the Dubai or Abu Dhabi onshore courts would rule.)

At the highest common-law level the point is now closed for FIDIC. Uniform Building Contractors Ltd v Water and Sewerage Authority of Trinidad and Tobago [2026] UKPC 2 held Sub-Clause 20.1 of the 1999 Yellow Book to be a condition precedent, "in classic condition precedent form", the defining feature being "dependency between the requirement and the relief. One must be conditional upon the other". The Board expressly observed that the 2017 form "has a slightly more flexible series of provisions" but remains "clearly a condition precedent."

Panther also decides something useful in the other direction: a valid notice can be "short and to the point" (even a brief email) provided it identifies the event, states that the contractor considers itself entitled to an extension of time or payment, arrives within the 28 days, and reaches the Engineer, not merely project management. The bar is strict, but it is not high.

One counterpoint worth knowing and worth handling carefully. In CIMIC Morningstar Investments Ltd v Chandos Construction Ltd, 2026 BCCA 2, leave to appeal an arbitral award was refused where the arbitrator had read a 10-day written notice requirement "in context", found the owner had actual knowledge from emails, meetings and schedule updates, applied the prevention principle to hold time at large, and awarded CAD 6.47M. It is a leave decision on an arbitral award. It confirms curial deference to an arbitrator's contextual reading of a notice clause. It does not restate the doctrine and it does not displace Technicore or Elite. Do not present it as a softening of Canadian notice law.

The notice is the cheapest of the four elements to get right

Of the four elements of an extension of time claim (qualifying event, causation to completion, notice and procedure, and extent) notice is the only one that costs nothing but attention, and it is the one on which entitlement is most often lost. Every other element requires records, programme analysis, expert opinion and argument. Notice requires a letter, on time, to the right person, in the right form.

The failure is almost never ignorance of the clause. It is a contract administrator who treats a monthly report or a progress-meeting minute as notice, or who waits for the commercial negotiation to settle before filing the time notice. Those two habits account for most of the procedural deaths in the cases surveyed here.

Two structural warnings to close on. First, the asymmetry inside JCT: the extension of time machinery is forgiving, but the money machinery is not, and FES is the authority that a contractor can hold its time entitlement and lose its prolongation costs on identical facts for a purely procedural reason. Second, there is no reported English judgment construing the JCT 2024 extension of time provisions as at August 2026. Every English decision in the 2025–26 window was decided on a 2016 form. Advice on the 2024 suite is advice on unlitigated text, and should be given as such, which is one more reason to serve the notice rather than to argue afterwards about whether it was required.

About this material Library content is general information about construction claim practice, not legal advice. Entitlement, deadlines and procedure are governed by your own contract and by the law of the place the work is performed. Reviewed August 7, 2026 · Report a correction