I would refer you to California Health & Safety Code 11550, part of which reads:
11550. (a) No person shall use, or be under the influence of any
controlled substance which is (1) specified in subdivision (b), (c),
or (e), or paragraph (1) of subdivision (f) of Section 11054,
specified in paragraph (14), (15), (21), (22), or (23) of subdivision
(d) of Section 11054, specified in subdivision (b) or (c) of Section
11055, or specified in paragraph (1) or (2) of subdivision (d) or in
paragraph (3) of subdivision (e) of Section 11055, or (2) a narcotic
drug classified in Schedule III, IV, or V, except when administered
by or under the direction of a person licensed by the state to
dispense, prescribe, or administer controlled substances.
I know someone personally that was arrested for violating 11550a, they were a passenger in a car that crashed, someone else had drugs in their possession, of course that person was also arrested, but for possession.