Cal. Gov. Code § 53398.87
Upon the approval of its governing board, a city, county, or special district that contains territory within the boundaries of a district, may loan moneys to the district to fund those activities described in the infrastructure financing plan approved and adopted pursuant to Section 53398.69. Moneys loaned pursuant to this provision may be repaid at an interest rate that does not exceed the Local Agency Investment Fund rate that is in effect on the date that the loan is approved by the governing board. Notwithstanding any other provision of law it is the intent of the Legislature that any loan issued to a public financing authority by a governmental entity shall be repaid fully unless agreed to otherwise between the authority and the governmental entity.
Ca. Gov. Code § 53398.87