Summary: Revises Tariff WN U-75, Schedules 135 and 136, adopting new definitions and conditions in the net metering statute, Chapter RCW 80.60, resulting from SSSB 5223, which becomes effective on July 28, 2019. Based on analyses of the incremental cost for aggregated meters, the company also proposes to reduce the amount of the monthly administrative Aggregation Charge billed to customer-generators who choose to aggregate to $3 per month.