California Code, Government Code - GOV § 53197

(a) The legislative body may request the county in which the district is located to collect the contingent assessment on behalf of the district.  If the assessment is collected by the county, the county may deduct its reasonable costs incurred for that service before remitting the balance to the district.

(b) The legislative body of each local agency which enters into a reimbursement agreement pursuant to this chapter shall create a district reimbursement fund.  All revenue collected within the district pursuant to this chapter, including penalties, shall be deposited in the fund and disbursed, as provided by the legislative body, subject to the terms of any reimbursement agreement.