Cal. Penal Code § 11475

A government entity that interrupts a communication service pursuant to paragraph (2) of subdivision (b) of Section 11471 shall take all of the following steps: (a) Apply for a court order under Section 11472 without delay. If possible, the application shall be filed within six hours after commencement of the interruption. If that is not possible, the application shall be filed at the first reasonably available opportunity, but in no event later than 24 hours after commencement of an interruption of a communication service. If an application is filed more than six hours after commencement of an interruption of a communication service, the application shall include a declaration, made under penalty of perjury, stating the reason for the delay. (b) Prepare a signed statement of intent to apply for a court order. The statement of intent shall clearly describe the extreme emergency situation and the specific communication service to be interrupted. If a government entity does not apply for a court order within six hours, the government entity shall submit a copy of the signed statement of intent to the court within six hours. (c) Provide conspicuous notice of the application for a court order on the government entity’s Internet Web site without delay, unless the circumstances that justify an interruption of a communication service without first obtaining a court order also justify not providing the notice.