California Code
ARTICLE 5 - Disclosure in Advertisements
Section 84506.5.

84506.5. An advertisement supporting or opposing a candidate that is paid for by an independent expenditure shall include a statement that it was not authorized by a candidate or a committee controlled by a candidate. If the advertisement was authorized or paid for by a candidate for another office, the expenditure shall instead include a statement that “This advertisement was not authorized or paid for by a candidate for this office or a committee controlled by a candidate for this office.”

(Amended by Stats. 2017, Ch. 546, Sec. 20. (AB 249) Effective October 7, 2017. Operative January 1, 2018, by Stats. 2017, Ch. 546, Sec. 29.)