California Code, Business and Professions Code - BPC § 6157

(a) “Advertise” means to engage in any communication constituting an advertisement.

(b) “Advertisement” means any communication, through any written, recorded, or electronic means, whether available to, or directed generally to, members of the public or to a limited group of individuals, that provides information concerning a lawyer or the lawyer's services for the purpose of encouraging individuals to secure the services of the lawyer or their law firm.

(c) “Electronic medium” means television, radio, or computer networks.

(d) “Lawyer” means a licensee of the State Bar of California or a person who is admitted in good standing and eligible to practice before the bar of any United States court or the highest court of the District of Columbia or any state, territory, or insular possession of the United States, or is licensed to practice law in, or is admitted in good standing and eligible to practice before the bar of the highest court of, a foreign country or any political subdivision thereof, and includes any agent of the lawyer, law firm, or law corporation doing business in the state.

(e) “Licensee” means a licensee in good standing of the State Bar and includes any agent of the licensee and any law firm or law corporation doing business in the State of California.