Cal. Civ. Code § 1812.606
Every auctioneer who operates his or her own auction company as a sole proprietor, and every auction company, together with its owners, partners, and officers, that employs an auctioneer, shall be responsible for all violations committed by the auctioneer or by any company employee in the conduct of auction business. An auctioneer who is employed by an auctioneer or auction company shall be responsible for all violations committed by him or her in the conduct of auction business.
It is a violation of this title for any auctioneer or auction company, or the company's owners, partners, and officers, to direct or knowingly permit any violation of this title by any auctioneer employed by or under contract with that auctioneer or auction company, or by any owner, partner, officer, agent, or employee of the auction company.
Ca. Civ. Code § 1812.606