{"data":{"id":"us/18-cfr-35.40","jurisdiction":"us","citation":"18 CFR 35.40","heading":"Ancillary services.","body":"A Seller may make sales of ancillary services at market-based rates only if it has been authorized by the Commission and only in specific geographic markets as the Commission has authorized.","path":["Title 18—Conservation of Power and Water Resources","CHAPTER I—FEDERAL ENERGY REGULATORY COMMISSION, DEPARTMENT OF ENERGY","SUBCHAPTER B—REGULATIONS UNDER THE FEDERAL POWER ACT","PART 35—FILING OF RATE SCHEDULES AND TARIFFS","Subpart H—Wholesale Sales of Electric Energy, Capacity and Ancillary Services at Market-Based Rates"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-18.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:24:34Z","sha256":"505cf6ffbacb150547a24374f9446412d858d53a5a72c3aeddfd538790591352","source_id":"us-cfr","stale":true,"prev":"us/18-cfr-35.39","next":"us/18-cfr-35.41"},"notice":"GroundRules: Original legal text. Not legal advice."}