Under the Act, the Owner must either pay the Contractor within 28 days of receipt of a proper invoice or issue a "Notice of Non-Payment" within 14 days.  Subsequent payments and Notices to subcontractors must be made by the contractor and subcontracts within 7 day intervals of either payment or Notice receipt.   Read more about the specific timelines for all suppliers and traders within the Construction Act here.  A Notice must be in form proscribed by the act.  Partial payments must be distributed on a pro-rated basis down the construction pyramid.  Any late payments are subject to specified interest rates.  Issuing a “Notice of Non-Payment” and undertaking Adjudication by the deadlines set out by the Act does not however guarantee security for payment.  Take care not to let your lien rights and bond claims expire.