Cal. Welf. & Inst. Code § 328.2

The State Department of Social Services shall update all regulations, all-county letters, and other instructions relating to the investigation of a minor who may be described by Section 300 to ensure that, when a social worker is investigating an alleged case of child abuse or neglect, a parent’s or guardian’s use or possession of cannabis is treated in the same manner as a parent’s or guardian’s use or possession of alcohol and legally prescribed medication.