California Code, Insurance Code - INS § 10094.2

(a) Notwithstanding subdivision (c) of Section 10095, the facility shall, pursuant to regulations adopted by the commissioner, provide for a method whereby insurers who voluntarily write basic property insurance on risks located in areas designated at the beginning of the policy period as brush hazard areas by the Insurance Services Office (ISO) or designated at the beginning of the policy period as high or very high fire hazard severity zones as determined and mapped by the Department of Forestry and Fire Protection, or very high fire hazard severity zones as determined and mapped by the Department of Forestry and Fire Protection pursuant to Section 51178 of the Government Code will, to that extent, be proportionately relieved of the liability to participate in a plan adopted pursuant to this chapter.  The facility shall, pursuant to regulations adopted by the commissioner, provide for a method whereby insurers who voluntarily write basic property insurance or business owners package insurance on risks located in areas designated as inner-city areas by the commissioner will, to that extent, be proportionately relieved of the liability to participate in a plan adopted pursuant to this chapter.  This chapter does not preclude adoption of a plan or plans to allow proportionate credit for voluntary writings in other areas or for other classes of insurance.