HAMMER HAYNES ROOSOn May 11, Arizona Governor Jan Brewer signed into law a bill that substantially modifies existing Arizona law concerning the prompt payment of contractors, subcontractors and materials suppliers on private projects. Although Arizona law requires prompt payment of contractors on both public and private construction projects, the new law, S.B. 1375, alters only the statutes that govern private contracts. No Change to Payment Cycle The bill retains the existing 21-day cycle for progress payments (14 days for the owner to certify and approve the payment application from the prime contractor and seven days thereafter to make the payment).