Welfare and Institutions Code § 5343

Notwithstanding any other provision of law, if any person is a danger to others or to himself or herself, or gravely disabled, as a result of the use of controlled substances, he or she shall be subject, insofar as possible, to the provisions of Articles 1 (commencing with Section 5150), 2 (commencing with Section 5200), 4 (commencing with Section 5250), 5 (commencing with Section 5275), and 7 (commencing with Section 5325) of this chapter, except that any custody, evaluation and treatment, or any procedure pursuant to such provisions shall only be related to and concerned with the problem of the person’s use of controlled substances.