Cal. Pub. Util. Code § 349

The Independent System Operator shall perform a review following a major outage that affects at least l0 percent of the customers of the entity providing the local distribution service. The review shall address the cause of the major outage, the response time and effectiveness, and whether the transmission facility owner or operator’s operation and maintenance practices enhanced or undermined the ability to restore service efficiently and in a timely manner. If the Independent System Operator finds that the operation and maintenance practices of the transmission facility owner or operator prolonged the response time or was responsible for the outage, the Independent System Operator may order appropriate sanctions, subject to the Federal Energy Regulatory Commission approving that authority.