Cal. Penal Code § 647d

(a) Notwithstanding any other provision of law, subdivision (b) shall become operative in a county only if the board of supervisors adopts the provisions of subdivision (b) by ordinance after a finding that sufficient alcohol treatment and recovery facilities exist or will exist to accommodate the persons described in that subdivision. (b) In any accusatory pleading charging a violation of subdivision (f) of Section 647, if the defendant has been previously convicted two or more times of a violation of subdivision (f) of Section 647 within the previous 12 months, each such previous conviction shall be charged in the accusatory pleading. If two or more of the previous convictions are found to be true by the jury, upon a jury trial, or by the court, upon a court trial, or are admitted by the defendant, the defendant shall be imprisoned in the county jail for a period of not less than 90 days. The trial court may grant probation or suspend the execution of sentence imposed upon the defendant if the court, as a condition of the probation or suspension, orders the defendant to spend 60 days in an alcohol treatment and recovery program in a facility which, as a minimum, meets the standards described in the guidelines for alcoholic recovery home programs issued by the Division of Alcohol Programs of the Department of Alcohol and Drug Abuse. (c) The provisions of Section 4019 shall apply to the conditional attendance of an alcohol treatment and recovery program described in subdivision (b).