Cal. Welf. & Inst. Code § 358
(a) After finding that a child is a person described in Section 300, the court shall hear evidence on the question of the proper disposition to be made of the child. Prior to making a finding required by this section, the court may continue the hearing on its own motion, the motion of the parent or guardian, or the motion of the child, as follows:
(b)
(3) When making the determination required pursuant to paragraph (2), the court may consider, among other examples of due diligence, the extent to which the social worker has complied with paragraph (1) of subdivision (e) of Section 309, and has done any of the following:
(d)
(1) The court shall hold a dispositional proceeding for a youth 18 years of age if both of the following requirements are met:
(5)