What it Does: Implements portions of Assembly Bill (AB) 117 concerning Community Choice Aggregation (CCA). AB 117 permits cities and counties to purchase and sell electricity on behalf of utility customers in their jurisdictions after they have registered with the Commission as "Community Choice Aggregators." The proceeding has been bifurcated. Phase I dealt with such issues as implementation and transaction costs, customer information, and set the cost responsibility surcharge (CRS). Phase II addresses the transition and implementation issues between the utilities and the CCAs, and issues of determining cost responsibility for individual CCAs, known as "vintaging."