Summary: Revises Tariff WN-U-60, Schedule 26 - Large Demand General Service, and Schedule 31 - Primary General Service, to extend the starting date of the Conjunctive Demand Service Option (CDSO) from March 1, 2021, to June 30, 2021. The filing also revises language to clarify how the CDSO will be billed. More information on the CDSO Pilot Program is available in PSE's 2019 GRC, Docket UE-190529.