CA AB2500

Replaces blanket prohibition on driving with "any detectable amount" of certain drugs with specific nanogram thresholds for amphetamine (100 ng/mL), methamphetamine (100 ng/mL), cocaine (50 ng/mL), heroin (50 ng/mL), morphine (50 ng/mL), phencyclidine (10 ng/mL), and delta-9-tetrahydrocannabinol/marijuana (2 ng/mL).

Adds heroin metabolite 6-monoacetylmorphine (10 ng/mL) and cocaine metabolite (50 ng/mL) as separately prohibited substances with specific threshold amounts.

Applies the new drug-specific nanogram standards to both driving under the influence charges (Vehicle Code Section 23152) and driving under the influence causing bodily injury charges (Vehicle Code Section 23153).

Exempts the state from providing reimbursement to local agencies or school districts for implementation costs under California Constitution Article XIII B because the act modifies criminal penalties and definitions.