Cal. ELEC § 18620

Every person who seeks, solicits, bargains for, or obtains any money, thing of value, or advantage of or from any person, firm, or corporation for the purpose or represented purpose of fraudulently inducing, persuading, or seeking the proponent or proponents of any initiative or referendum measure or recall petition to (a) abandon the measure or petition, (b) fail, neglect, or refuse to file in the office of the elections official or other officer designated by law, within the time required by law, the initiative or referendum measure or recall petition after securing the number of signatures required to qualify the measure or petition, (c) stop the circulation of the initiative or referendum measure or recall petition, or (d) perform any act that will prevent or aid in preventing the initiative or referendum measure or recall petition from qualifying as an initiative or referendum measure, or the recall petition from resulting in a recall election, is punishable by a fine not exceeding five thousand dollars ($5,000), or 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.