Cal. Health & Saf. Code § 11562
When the Youth Authority concludes that there are reasonable grounds for believing that a person committed to its custody, and on parole, is addicted or habituated to, or is in imminent danger of addiction or habituation to, controlled substances or alcohol, it may, in accordance with procedures used to revoke parole, issue an order to detain or place that person in a substance abuse treatment control unit for not to exceed 90 days. The order shall be a sufficient warrant for any peace officer or employee of the Department of the Youth Authority to return to physical custody that person. Detention pursuant to the order shall not be deemed a suspension, cancellation, or revocation of parole unless the Youth Authority so orders pursuant to Section 1767.3 of the Welfare and Institutions Code.
With the consent of the Director of Corrections, the Director of the Youth Authority may, pursuant to this section, confine the addicted or habituated or potentially addicted or habituated person, over 18 years of age, in a substance abuse treatment control unit established by the Department of Corrections.
No person committed to the custody of the Youth Authority and on parole shall be placed in a substance abuse treatment control unit against his or her will.
Ca. Health and Saf. Code § 11562