California Code, Government Code - GOV § 87104

(a) A public official of a state agency shall not, for compensation, act as an agent or attorney for, or otherwise represent, any other person by making any formal or informal appearance before, or any oral or written communication to, the official's state agency or any officer or employee thereof, if the appearance or communication is for the purpose of influencing a decision on a contract, grant, loan, license, permit, or other entitlement for use.

(b) For purposes of this section, “public official” includes a member, officer, employee, or consultant of an advisory body to a state agency, whether the advisory body is created by statute or otherwise, except when the public official is representing the official's employing state, local, or federal agency in an appearance before, or communication to, the advisory body.