Cal. Gov. Code § 39581
The amount of the assessment shall be collected at the time and in the manner of ordinary municipal taxes. If delinquent, the amount is subject to the same penalties and procedure of foreclosure and sale provided for ordinary municipal taxes.
The legislative body may determine that, in lieu of collecting the entire assessment at the time and in the manner of ordinary municipal taxes, such assessments of fifty dollars ($50) or more may be made in annual installments, in any event not to exceed five, and collected one installment at a time at the times and in the manner of ordinary municipal taxes in successive years. If any installment is delinquent, the amount thereof is subject to the same penalties and procedure for foreclosure and sale provided for ordinary municipal taxes. The payment of assessments so deferred shall bear interest on the unpaid balance at a rate to be determined by the legislative body, not to exceed 6 percent per annum.
Ca. Gov. Code § 39581