Cal. Welf. & Inst. Code § 365

The court may require the social worker or any other agency to render any periodic reports concerning children committed to its care, custody, and control under the provisions of Section 362 that the court deems necessary or desirable. The court may require that the social worker, or any other public agency organized to provide care for needy or neglected children, shall perform the visitation and make periodic reports to the courts concerning children committed under those provisions that the court deems necessary or desirable.