California Code, Government Code - GOV § 53880

Notwithstanding any other provision of law, before a water district, as defined in Section 20200 of the Water Code, takes an action that will terminate another party's interest in real property as the means of collecting or enforcing delinquent assessments, fees, charges, or other levies, the district shall make a reasonable effort to ascertain the names and addresses of each holder of an interest in the delinquent property that would be terminated by the district.  The district shall then provide each interest holder not less than 45 days' notice, by certified mail, at that party's last known address, of the intent of the district to take action that would terminate the party's interest in the delinquent property.