Cal. Bus. & Prof. Code § 6127.5
Nothing in Sections 6125, 6126 and 6127 shall be deemed to apply to the acts and practices of a law corporation duly certificated pursuant to the Professional Corporation Act, as contained in Part 4 (commencing with Section 13400) of Division 3 of Title 1 of the Corporations Code, and pursuant to Article 10 (commencing with Section 6160) of Chapter 4 of Division 3 of this code, when the law corporation is in compliance with the requirements of (a) the Professional Corporation Act; (b) Article 10 (commencing with Section 6160) of Chapter 4 of Division 3 of this code; and (c) all other statutes and all rules and regulations now or hereafter enacted or adopted pertaining to such corporation and the conduct of its affairs.
Ca. Bus. and Prof'l. Code § 6127.5