Security of Payment NT: a builders guide to the West Coast model

What it is

The Construction Contracts (Security of Payments) Act 2004 (NT) is the Northern Territorys security of payment statute. It is the West Coast model, copied from the original Western Australian Construction Contracts Act 2004 (WA) and very different from the East Coast model used in New South Wales, Victoria, Queensland, Tasmania, the ACT and South Australia.

The two models share the same purpose. Both aim to keep cash moving down the contractual chain and stop principals using payment refusal as a negotiating tool. The mechanics are not the same. A builder used to the NSW or Victorian regime will misuse the NT Act if they treat it as the same scheme.

How the West Coast model differs

Three differences matter for NT builders.

First, there is no statutory payment claim form and no statutory payment schedule. The Act does not force a written response from the respondent on a tight clock. Instead, the Act steps in where the contract is silent by implying minimum terms about claim form, response and timing.

Second, adjudication is single-step and merits-based. The adjudicator decides the whole dispute on the documents within a tight statutory timeframe. There is no separate claim and schedule stage before adjudication can run. Adjudication is the dispute step.

Third, the time bar runs from when the payment dispute arises, not from receipt of a schedule or a missed payment date. The Northern Territory window is 90 days from the dispute arising. That is far longer than the 10 business day window under the East Coast regimes, but it is also a substantive cut-off that, once missed, closes the door.

Who it applies to

The Act applies to construction contracts under which a party undertakes to carry out construction work or supply related goods or services in the Northern Territory. The defined work is broad and covers most building, civil, fitout and trade work.

Exclusions include:

• Contracts for construction work on a single-dwelling residential building between the head contractor and an owner-occupier
• Drilling and exploration mining contracts
• Contracts under which the consideration is not money

The owner-occupier exclusion mirrors the WA exclusion. A residential builder building a single dwelling for the homeowner cannot use the Act against that homeowner.

Implied contract terms

If the contract is silent on a matter the Act fills the gap with implied terms. The main implied terms cover:

• The form and content of a payment claim
• The time within which a payment claim must be responded to
• The due date for payment (28 days after the claim if not otherwise specified)
• Retention money handling
• Interest on overdue payments

If the contract has its own clauses on these points, the contract terms apply provided they are not less favourable to the claimant. The Act sets a floor.

When a payment dispute arises

A payment dispute under the NT Act arises when:

• The amount claimed in a payment claim is due to be paid under the contract but is not paid in full
• The amount claimed in a payment claim is rejected or wholly or partly disputed
• A payment claim is not responded to within the contractual time, or within 14 days if the contract is silent

The day the dispute arises is the trigger for the 90 day adjudication time bar.

Adjudication

Adjudication is started by a written application served on the other party, the nominated adjudicator and a prescribed appointer. The application must be made within 90 days of the day the payment dispute arose.

The respondent has 10 working days from receipt of the application to lodge a response. The adjudicator has 10 working days from receipt of the response, or from when a response was due if none is filed, to make a determination, unless the parties agree to a longer time.

The determination is binding on an interim basis. It is enforceable by registration as a judgment in a court of competent jurisdiction.

Enforcement and payment

An adjudicator can order one party to pay an amount to the other within a stated period. If that amount is not paid the determination can be registered as a judgment and enforced like any other money judgment, including by garnishee, writ for the seizure of property or winding-up proceedings if the debtor is a company.

Review

A determination can be reviewed by the Northern Territory Civil and Administrative Tribunal on limited grounds. The grounds are narrow. They cover situations such as the adjudicator lacking jurisdiction or failing to comply with the rules of natural justice. The tribunal is not a merits review.

Practical points for NT builders

The 90 day window looks generous compared to the East Coast 10 day window. It is not. Construction disputes drag on while parties try to negotiate, and many NT claimants discover the 90 day deadline has passed while they were still trying to settle. Diarise the dispute date the moment it crystallises.

Get the implied terms framework right. Many NT contracts are silent on payment claim form or response time. In those cases the Act fills the gaps but the implied terms differ from what most East Coast builders expect. Read the implied terms schedule of the Act before sending the first invoice.

The owner-occupier carve-out is the same trap that exists in WA. A builder on a single dwelling for the homeowner cannot use the Act. Subcontract chains under that builder remain inside the Act and have full rights.