Cal. Welf. & Inst. Code § 1731.6

(a) In any county in which there is in effect a contract made pursuant to Section 1752.1, if a court has determined that a person comes within the provisions of Section 1731.5 and concludes that a proper disposition of the case requires such observation and diagnosis as can be made at a diagnostic and treatment center of the Youth Authority, the court may continue the hearing and order that such person be placed temporarily in such a center for a period not to exceed 90 days, with the further provision in such order that the Director of the Youth Authority report to the court its diagnosis and recommendations concerning the person within the 90-day period.

(b) The Director of the Youth Authority shall, within the 90 days, cause the person to be observed and examined and shall forward to the court his diagnosis and recommendation concerning such person’s future care, supervision, and treatment.

(c) The Youth Authority shall accept such person if it believes that the person can be materially benefited by such diagnostic and treatment services and if the Director of the Youth Authority certifies that staff and institutions are available. No such person shall be transported to any facility under the jurisdiction of the Youth Authority until the director has notified the referring court of the place to which such person is to be transported and the time at which he can be received.

(d) Notwithstanding the provisions of subdivision (c), the Youth Authority shall accept without cost to the county any persons remanded pursuant to Section 707.2.

(e) The sheriff of the county in which an order is made placing a person in a diagnostic and treatment center pursuant to this section, or any other peace officer designated by the court, shall execute the order placing such person in the center or returning him therefrom to the court. The expense of such sheriff or other peace officer incurred in executing such order is a charge upon the county in which the court is situated.