Cal. Government Code § 66474.02

(a) Before approving a tentative map, or a parcel map for which a tentative map was not required, for an area located in a state responsibility area or a very high fire hazard severity zone, as both are defined in Section 51177, a legislative body of a county shall, except as provided in subdivision (b), make the following findings: (1) A finding supported by substantial evidence in the record that the subdivision is consistent with regulations adopted by the State Board of Forestry and Fire Protection pursuant to Sections 4290 and 4291 of the Public Resources Code or consistent with local ordinances certified by the State Board of Forestry and Fire Protection as meeting or exceeding the state regulations. (2) A finding supported by substantial evidence in the record that structural fire protection and suppression services will be available for the subdivision through any of the following entities: (A) A county, city, special district, political subdivision of the state, or another entity organized solely to provide fire protection services that is monitored and funded by a county or other public entity. (B) The Department of Forestry and Fire Protection by contract entered into pursuant to Section 4133, 4142, or 4144 of the Public Resources Code. (b) Upon approving a tentative map, or a parcel map for which a tentative map was not required, for an area located in a state responsibility area or a very high fire hazard severity zone, as both are defined in Section 51177, a legislative body of a county shall transmit a copy of the findings required in subdivision (a) and accompanying maps to the State Board of Forestry and Fire Protection. (c) (1) Subdivision (a) does not apply to the approval of a tentative map, or a parcel map for which a tentative map was not required, that would subdivide land identified in the open space element of the general plan for the managed production of resources, including, but not limited to, forest land, rangeland, agricultural land, and areas of economic importance for the production of food or fiber, if the subdivision is consistent with the open space purpose and if, for the subdivision of land that would result in parcels that are 40 acres or smaller in size, those parcels are subject to a binding and recorded restriction prohibiting the development of a habitable, industrial, or commercial building or structure. All other structures shall comply with defensible space requirements described in Section 51182 of this code or Sections 4290 and 4291 of the Public Resources Code. (2) Any later approval to remove a binding restriction placed as a condition of a tentative map, or a parcel map for which a tentative map was not required, that would allow the development of a building or structure for a parcel that has previously been exempted from the requirements of subdivision (a) pursuant to paragraph (1) of this subdivision shall be subject to the requirements of subdivision (a). (d) This section does not supersede regulations established by the State Board of Forestry and Fire Protection or local ordinances that provide equivalent or more stringent minimum requirements than those contained within this section.