California Code, Penal Code - PEN § 1000.6

(a) A person who is participating in a pretrial diversion program or a preguilty plea program pursuant to this chapter is authorized under the direction of a licensed health care practitioner, to use medications including, but not limited to, methadone, buprenorphine, or levoalphacetylmethadol (LAAM) to treat substance use disorders if the participant allows release of his or her medical records to the court presiding over the participant's preguilty plea or pretrial diversion program for the limited purpose of determining whether or not the participant is using such medications under the direction of a licensed health care practitioner and is in compliance with the pretrial diversion or preguilty plea program rules.

(b) If the conditions specified in subdivision (a) are met, the use by a participant of medications to treat substance use disorders shall not be the sole reason for exclusion from a pretrial diversion or preguilty plea program.  A patient who uses medications to treat substance use disorders and participates in a preguilty plea or pretrial diversion program shall comply with all court program rules.

(c) A person who is participating in a pretrial diversion program or preguilty plea program pursuant to this chapter who uses medications to treat substance use disorders shall present to the court a declaration from his or her health care practitioner, or his or her health care practitioner's authorized representative, that the person is currently under their care.

(d) Urinalysis results that only establish that a person described in this section has ingested medication duly prescribed to that person by his or her physician or psychiatrist, or medications used to treat substance use disorders, shall not be considered a violation of the terms of the pretrial diversion or preguilty plea program under this chapter.

(e) Except as provided in subdivisions (a) to (d), inclusive, this section does not affect any other law governing diversion programs.