California Code, Public Utilities Code - PUC § 348

The Independent System Operator shall adopt inspection, maintenance, repair, and replacement standards for the transmission facilities under its control no later than September 30, 1997. The standards, which shall be performance or prescriptive standards, or both, as appropriate, for each substantial type of transmission equipment or facility, shall provide for high quality, safe, and reliable service. In adopting its standards, the Independent System Operator shall consider: cost, local geography and weather, applicable codes, national electric industry practices, sound engineering judgment, and experience. The Independent System Operator shall also adopt standards for reliability, and safety during periods of emergency and disaster.The Independent System Operator shall report to the Oversight Board, at such times as the Oversight Board may specify, on the development and implementation of the standards in relation to facilities under the operational control of the Independent System Operator. The Independent System Operator shall require each transmission facility owner or operator to report annually on its compliance with the standards. That report shall be made available to the public.