Legal and regulatory

The California ISO operates under the terms and conditions of its FERC-approved tariff, which is modified, amended, supplemented or restated as needed. Read about how sections of the tariff are maintained and updated and how they interact with existing ISO contracts, and more.

All publicly available California ISO-authored filings and FERC orders are available.

Business Practice Manuals (BPMs) provide detailed rules, procedures and examples for the administration, operation, planning, and accounting requirements of the California ISO and the market that are consistent with the ISO tariff. Find the BPM document library, BPM change management application, and the BPM change management process.

The ISO provides public notice of certain information as required legally and by ISO policies including alternative dispute resolution, government information requests, corporate records and open meetings.

The ISO enters into agreements with market participants to define the rates, terms and conditions of service that are administered by the ISO in accordance with our tariff. Find standard forms of agreement for service, as well as non-standard forms that generally are specifically negotiated, such as the transmission control agreement.

Maintaining the highest professional standards for honest and ethical conduct helps the ISO meet its core values. It drives our reputation as a transparent and trustworthy organization. Learn how this requires constant vigilance from all ISO employees to ensure compliance.

Operating procedures implement the policies and authorities contained in the California ISO Tariff and Business Practice Manuals. We provide public access to current versions of the operating procedures.