CA Penal Code Section 186.33

(a)

Any person required to register pursuant to Section 186.30 who knowingly violates any of its provisions is guilty of a misdemeanor.

(b)

(1)Any person who knowingly fails to register pursuant to Section 186.30 and is subsequently convicted of, or any person for whom a petition is subsequently sustained for a violation of, any of the offenses specified in Section 186.30, shall be punished by an additional term of imprisonment in the state prison for 16 months, or two or three years. The court shall select the sentence enhancement which, in the court’s discretion, best serves the interests of justice and shall state the reasons for its choice on the record at the time of sentencing in accordance with the provisions of subdivision (d) of Section 1170.1.

(2)

The existence of any fact bringing a person under this subdivision shall be alleged in the information, indictment, or petition, and be either admitted by the defendant or minor in open court, or found to be true or not true by the trier of fact.

(c)

This section shall remain in effect only until January 1, 2017, and as of that date is repealed, unless a later enacted statute, that is enacted before January 1, 2017, deletes or extends that date.