Cal. Insurance Code § 10087.5

(a) Every policy of residential property insurance which provides coverage for loss or damage to a structure from the peril of earthquake, but that provides for an uninsured deductible amount computed as a percentage, shall clearly disclose on the page setting forth the policy declarations the basis upon which the percentage is computed. This disclosure shall be printed in at least 10-point bold typeface. (b) Every advertisement for a policy subject to subdivision (a) shall clearly disclose the deductible by stating the applicable percentage and the basis upon which the percentage is computed. (c) Every policy of residential property insurance or policy endorsement covering an individual condominium unit for loss or damage from the peril of earthquake shall disclose on the policy declarations page, in at least 10-point bold typeface, if the policy or endorsement provides no coverage for loss assessment. If the policy or endorsement provides that loss assessment coverage is limited or changed as a result of any provision of the insurance policy or policy endorsement purchased by the corporation or association of property owners, or as a result of an assessment to pay a deductible amount under the corporation or association policy, the nature of the limitation or change shall also be disclosed on the policy declarations page. If because of lack of space or other practical limitations the policy declarations page cannot contain the disclosure required by this subdivision, the disclosure may be placed on the page immediately following the policy declarations page and shall be printed in at least 12-point bold typeface. Nothing in this subdivision shall be construed to require an insurer to provide a disclosure for loss assessment if the only limitations on loss assessment coverage are the policy limits. (d) The commissioner shall issue a bulletin that specifies the language of the disclosure required by subdivision (c). The commissioner may specify different disclosures to explain more accurately different coverages offered by insurers.