California Code, Penal Code - PEN § 667.10

(a) Any person who has a prior conviction of the offense set forth in Section 289 and who commits that crime against a person who is 65 years of age or older, or against a person who is blind, deaf, developmentally disabled, as defined in subdivision (d) of Section 667.9, a paraplegic, or a quadriplegic, or against a person who is under the age of 14 years, and that disability or condition is known or reasonably should be known to the person committing the crime, shall receive a two-year enhancement for each violation in addition to the sentence provided under Section 289.

(b) The existence of any fact which would bring a person under subdivision (a) shall be alleged in the information or indictment and either admitted by the defendant in open court, or found to be true by the jury trying the issue of guilt or by the court where guilt is established by plea of guilty or nolo contendere or by trial by the court sitting without a jury.