Provisions for drug-related offences are contained in a raft of laws variously defined in the Measure for Suppressing Narcotic Offenders Act 2534 (1991) as being 'laws governing narcotics and laws governing active materials which have an active effect on the mind and the nerves.' The two most important Acts for practical purposes are the Narcotics Act 2522 (1979) and the Psychotropic Substances Act 2518 (1975).