California Code, Government Code - GOV § 53199

Remedies for collecting and enforcing the contingent assessments and penalties are cumulative and may be pursued alternatively, or consecutively, as determined by the legislative body.  If any one of the remedies is or may be invalid, all valid remedies shall remain effective until the contingent assessments and penalties have been fully collected and the terms of any reimbursement agreement have been satisfied.  The costs of collection and enforcement of the remedies for the collection of the contingent assessments and penalties may be paid from the proceeds collected from the contingent assessments and penalties if the legislative body so provides, and if that payment does not violate the terms of any reimbursement agreement.