This Nodal Protocol Revision Request (NPRR) implements several improvements to Firm Fuel Supply Service (FFSS) fuel cost recovery process. Specific changes include: Clarifying that Qualified Scheduling Entities (QSEs) representing FFSS Resources (FFSSRs) are able to restock reserved fuel using existing fuel inventories in storage to accelerate the restocking of fuel or based on new purchases. For fuel restocking using existing fuel inventories, the Firm Fuel Supply Service Fuel Replacement Cost may be based on: New fuel purchases made within 30 days after ERCOT approves the restock of the burned fuel as described in paragraph (5) of Section 3.14.5, Firm Fuel Supply Service; or the Fuel Oil Index Price (FOP) for the Operating Day the QSE received approval to restock fuel, which includes $0.05/gallon to cover the cost of transportation.