Replaced references to POLR with Affiliate REP where appropriate in 15.1.2, 15.1.3, and 19.3.1. Added language to 15.1.2 for process used when dropping a customer to the POLR for contract non-renewal. Added language to 15.1.2.9 for ERCOT process of notifying the POLR to submit switches on mass drop in the event of a CR default.