Cal. SHC § 35108.5

To expedite the making of any such acquisition and improvement, the legislative body may, at any time, transfer into the acquisition and construction fund, out of available funds, such sums as may be deemed necessary, and make such acquisitions or improvements or both, and pay such incidental expenses therefrom as deemed advisable, and such sums so transferred shall be deemed a loan to such special fund, and shall be repaid either from the proceeds of the bonds issued pursuant to this part, or from the gross or net revenues from the operation of the parking place or places, or from the net revenues from parking meters on some or all of the public ways in the district, or from ad valorem assessments levied upon real property in the district.