Cal. Government Code § 51186

(a) The local agency having jurisdiction of property upon which conditions regulated by Section 51182 are being violated shall notify the owner of the property to correct the conditions. If the owner fails to correct the conditions, the local agency may cause the corrections to be made, and the expenses incurred shall become a lien on the property that is the subject of the corrections when recorded in the county recorder’s office in the county in which the real property is located. The priority of the lien shall be as of the date of recording. The lien shall contain the legal description of the real property, the assessor’s parcel number, and the name of the owner of record as shown on the latest equalized assessment roll. (b) (1) Each local agency having jurisdiction of property upon which conditions that are regulated by Section 51182 apply shall make reasonable efforts to provide notice to affected residents within the jurisdiction of the local agency describing the requirements added by the amendments to paragraph (1) of subdivision (a) of Section 51182 made in Assembly Bill 3074 of the 2019–20 Regular Session before the imposition of penalties for violating those requirements. (2) (A) The requirement for an ember-resistant zone pursuant to Section 51182 shall not take effect for new structures until the State Board of Forestry and Fire Protection updates the regulations, pursuant to paragraph (1) of subdivision (a) of Section 51182, and the guidance document, pursuant to paragraph (2) of subdivision (c) of Section 51182. (B) The requirements for an ember-resistant zone pursuant to Section 51182 shall take effect for existing structures three years after the effective date for the new structures.