California Code
ARTICLE 4 - Issuing Ballots and Voting
Section 14291.

14291. (a) After the ballot is marked, a voter shall not show it to any person in a manner that reveals its contents, except as provided in subdivision (b).

(b) A voter may voluntarily disclose how he or she voted if that voluntary act does not violate any other law.

(Amended by Stats. 2016, Ch. 813, Sec. 2. (AB 1494) Effective January 1, 2017.)