California Code, Penal Code - PEN § 667.51

(a) A person who is convicted of violating Section 288 or 288.5 shall receive a five-year enhancement for a prior conviction of an offense specified in subdivision (b).

(b) Section 261, 264.1, 269, 285, 286, 287, 288, 288.5, or 289, former Section 262 or 288a, or any offense committed in another jurisdiction that includes all of the elements of any of the offenses specified in this subdivision.

(c) A violation of Section 288 or 288.5 by a person who has been previously convicted two or more times of an offense specified in subdivision (b) shall be punished by imprisonment in the state prison for 15 years to life.