"Subject to clauses 27.5.3 and 27.6.5.2 the provisions of this contract which require any further payment or any release or further release of retention to the contractor shall not apply; provided that clause 27.6.5.1 shall not be construed so as to prevent the enforcement by the contractor of any rights under this contract in respect of amounts properly due to be paid by the employer to the contractor which the employer has unreasonably not paid and which, where clause 27.3.4 applies, have accrued 28 days or more before the date when under clause 27.3.4 the employer could first give notice to determine the employment of the contractor…"
"The parties are free to agree the amounts of the payments and the intervals at which, or circumstances in which, they become due."
"110 (2). Every construction contract shall provide for the giving of notice by a party not later than five days after the date on which a payment becomes due from him under the contract, or would have become due if— (a) the other party had carried out his obligations under the contract, and (b) no set-off or abatement was permitted by reference to any sum claimed to be due under one or more other contracts, specifying the amount (if any) of the payment made or proposed to be made, and the basis on which that amount was calculated. 111.(1) A party to a construction contract may not withhold payment after the final date for payment of a sum due under the contract unless he has given an effective notice of intention to withhold payment. The notice mentioned in section 110(2) may suffice as a notice of intention to withhold payment if it complies with the requirements of this section. (2) To be effective such a notice must specify— (a) the amount proposed to be withheld and the ground for withholding payment, or (b) if there is more than one ground, each ground and the amount attributable to it, and must be given not later than the prescribed period before the final date for payment. (3) The parties are free to agree what the prescribed period should be…"
"Subject to clauses 27.5.3 and 27.6.5.2 the provisions of this Contract which require any further payment or any release or further release of Retention to the Contractor shall not apply."
"A party to a construction contract may not withhold payment after the final date for payment of a sum due under the contract unless he has given an effective notice of intention to withhold payment."
"9. Clearly setting out the period within which interim payments must be made to all participants in the process, failing which they will have an automatic right to compensation, involving payment of interest at a sufficiently heavy rate to deter slow payment."