Cal. Elec. Code § 18403

Any person other than an elections official or a member of the precinct board who receives a voted ballot from a voter or who examines or solicits the voter to show their voted ballot is punishable by a fine not exceeding ten thousand dollars ($10,000), by imprisonment pursuant to subdivision (h) of Section 1170 of the Penal Code for 16 months or two or three years, or in a county jail not exceeding one year, or by both that fine and imprisonment. This section does not apply to persons returning a vote by mail ballot pursuant to Section 3017 or persons assisting a voter pursuant to Section 14282.