Cal. Public Resources Code § 5096.518

For a charitable contribution claimed by a seller that is over five thousand dollars ($5,000) on conservation lands acquired using state funds, in order to substantiate the amount of the charitable contribution deduction claimed by the seller pursuant to Part 10 (commencing with Section 17001) or Part 11 (commencing with Section 23001) of Division 2 of the Revenue and Taxation Code, both of the following requirements shall apply: (a) The seller shall attach to his or her California income tax return a copy of the appraisal of the charitable contribution relied on by the acquisition agency. (b) The appraisal attached to the return shall be prepared by an appraiser licensed by the Office of Real Estate Appraisers pursuant to Part 3 (commencing with Section 11300) of Division 4 of the Business and Professions Code and shall comply with the applicable requirements of the Revenue and Taxation Code and the Internal Revenue Code for purposes of substantiating the amount of the contribution for California income and franchise tax purposes and federal income tax purposes.