(a)Any person 18 years of age or older who engages in sexual intercourse or sodomy with a child who is 10 years of age or younger is guilty of a felony and shall be punished by imprisonment in the state prison for a term of 25 years to life.
(b)Any person 18 years of age or older who engages in oral copulation or sexual penetration, as defined in Section 289, with a child who is 10 years of age or younger is guilty of a felony and shall be punished by imprisonment in the state prison for a term of 15 years to life.