Wat. Code, § 80826

(a) A local publicly owned electric utility that voluntarily participates in the department’s central procurement function pursuant to Section 80822 shall enter into an agreement with the department for the revenue requirement to fund its participation and that agreement shall have the force and effect of an irrevocable financing order.

(b) The agreement shall provide for the administration of the revenue requirement, including both of the following:

(1) A requirement that the department annually notify the local publicly owned electric utility of the annual collections received by the department with respect to the revenue requirement and the amount of any excess or deficiency in collections above or below the revenue requirement. The local publicly owned electric utility shall adjust charges in the subsequent year to reflect any such excess or deficiency.

(2) During any revenue requirement period, a requirement that, if the department forecasts that the revenue requirement for that period will not be met and that collections will not be sufficient to fund the revenue requirement established pursuant to Section 80842, the department notify the local publicly owned electric utility in writing and the local publicly owned electric utility shall act within 30 days of receiving that notice to increase the charge so that the amount collected during the period is sufficient to meet those obligations.