California Code, Penal Code - PEN § 801.1

(a)(1) Notwithstanding any other limitation of time described in this chapter, prosecution for a felony offense described in Section 261, 286, 287,288, 288.5, or 289, or former Section 288a, orSection 289.5, as enacted by Chapter 293 of the Statutes of 1991 relating to penetration by an unknown object, that is alleged to have been committed when the victim was under 18 years of age, may be commenced any time prior to the victim's 40th birthday.

(2) Paragraph (1) shall only apply to crimes that were committed on or after January 1, 2015, or for which the statute of limitations that was in effect prior to January 1, 2015, has not run as of January 1, 2015.