§ 312

California Vehicle Code · 2026 edition · updated 2026-10-04 · California

The term “drug” means any substance or combination of substances, other than alcohol, which could so affect the nervous system, brain, or muscles of a person as to impair, to an appreciable degree, his ability to drive a vehicle in the manner that an ordinarily prudent and cautious man, in full possession of his faculties, using reasonable care, would drive a similar vehicle under like conditions.

(Added by Stats. 1971, Ch. 1530.)

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California Vehicle Code

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