All special taxes levied pursuant to this article shall be administered in the following manner:
(a) Taxes collected shall be deposited in a separate fund, which shall be established in the treasury of each county and used only as prescribed by this section.
(b) The county shall transfer moneys intended for regional projects pursuant to Section 64650 from the fund to the authority periodically as promptly as feasible. The transmittals shall be made at least twice in each calendar quarter.
(c) The county may deduct incremental costs associated with administering any taxes approved pursuant to this article from the portion transferred to the authority pursuant to subdivision (b).