California Code, Penal Code - PEN § 288.4

(a)(1) Every person who, motivated by an unnatural or abnormal sexual interest in children, arranges a meeting with a minor or a person he or she believes to be a minor for the purpose of exposing his or her genitals or pubic or rectal area, having the child expose his or her genitals or pubic or rectal area, or engaging in lewd or lascivious behavior, shall be punished by a fine not exceeding five thousand dollars ($5,000), by imprisonment in a county jail not exceeding one year, or by both the fine and imprisonment.

(2) Every person who violates this subdivision after a prior conviction for an offense listed in subdivision (c) of Section 290 shall be punished by imprisonment in the state prison.