Pursuant to a resolution adopted by the board of supervisors, a county may lend any available county funds to a district for the replacement of obsolete lighting system equipment. Any such loan may be restricted for use in a temporary zone in a district. The loan shall bear interest at a rate to be fixed by the board of supervisors and shall be repaid in approximately equal installments over a period not to exceed 10 years. Any funds lent to the district are appropriated for the purposes for which the loan was made. Any area of a district, or of a temporary zone in a district, which is included in a city by annexation or incorporation after a loan has been made shall continue to be taxed or assessed for the repayment of its proportionate part of the unpaid balance of the loan.
If a zone is formed, the board of supervisors shall, in the first fiscal year in which a special tax or assessment may be levied in the zone, and in each succeeding year of the duration of the zone, levy a special tax upon the taxable property or assessment in the zone for the purpose of repaying the amount lent to the district by the county. When the loan has been repaid, the zone shall terminate.