Cal. Government Code § 7927.605

(a) Nothing in this division requires the disclosure of records that are any of the following: corporate financial records, corporate proprietary information including trade secrets, and information relating to siting within the state furnished to a government agency by a private company for the purpose of permitting the agency to work with the company in retaining, locating, or expanding a facility within California. (b) Except as provided in subdivision (c), incentives offered by a state or a local government agency, if any, shall be disclosed upon communication to the agency or the public of a decision to stay, locate, relocate, or expand, by a company, or upon application by that company to a governmental agency for a general plan amendment, rezone, use permit, building permit, or any other permit, whichever occurs first. (c) Before publicly disclosing a record that describes state or local incentives offered by an agency to a private business to retain, locate, relocate, or expand the business within California, the agency shall delete information that is exempt pursuant to this section.