California Code, Government Code - GOV § 53314.8

At any time either before or after the formation of the district, the legislative body may provide, by ordinance, that for a period specified in the ordinance, the local agency may contribute, from any source of revenue not otherwise prohibited by law, any specified amount, portion, or percentage of the revenues for the purposes set forth in the ordinance, limited to the following:  the acquisition or construction of a facility, the acquisition of interest in real property, or the payment of debt service with respect to the financing of either, the provision of authorized services, and the payment of expenses incidental thereto.  The contribution shall not constitute an indebtedness or liability of the local agency.