1.1.D.20 DAPP day Definition A 'DAPP day' is a day that falls within the person's DAPP period (1.1.D.30). Act reference: PPLAct section 115BB Determination on a claim for DAPP Policy reference: PPL Guide 1.1.D.30 DAPP period, 1.1.M.10 Maximum DAPP period, maximum DAPP period start day, maximum DAPP period end day