Cal. Harb. and Nav. Code § 6093.4
The board of supervisors shall at the time of levying the county taxes, levy a tax upon all the taxable property within the district sufficient to meet the amounts set forth in the final budget submitted by the district board; provided, that no taxes shall be levied for any capital outlay or capital outlay fund included in the final budget submitted by the district board, if not less than 10 percent of the qualified electors of the district have signed a petition filed with the board of supervisors protesting the levy for any capital outlay or capital outlay fund included in the final budget submitted by the district board, or if a written protest against the proposed capital outlay or capital outlay fund signed by a majority in number of the assessees of real property representing one-half or more of the assessed valuation of the taxable real property within the district, as shown by the last preceding equalized assessment roll, is filed with the board of supervisors, the board of supervisors shall delete said levy for capital outlay or capital outlay fund from the final budget before levying a tax to raise the amount required by the final budget. Such protest petition must be filed with the board of supervisors not later than five days prior to the final day on which the board of supervisors is required by law to make the annual tax levy. The money when collected by the tax collector of the county shall be paid to the treasurer of said district; provided further, that any levy for capital outlay or for capital outlay fund shall not exceed three cents ($0.03) per one hundred dollars ($100) assessed valuation of all the real and personal property in the district.
Ca. Harb. and Nav. Code § 6093.4