Cal. Penal Code § 824

When an adult willfully misrepresents himself or herself to be a minor under 18 years of age when taken into custody and this misrepresentation effects a material delay in investigation which prevents the filing of a criminal complaint against him or her in a court of competent jurisdiction within 48 hours, the complaint shall be filed within 48 hours from the time the true age is determined, excluding nonjudicial days.