Young people, when drafted into compulsory national service, can serve either in the army or the police force. National discipline has resulted in an effective crackdown on Chinese triad gangs, many of which have emigrated to other cities. The criminal justice system has borrowed heavily from the Japanese use of neighborhood police boxes. The courts are fair, the probation service is good, and the prisons are efficiently organized for custody and production. New legislation has allowed the police force to attack widespread drug use and trafficking in Singapore. Singapore may be the only country attacking the drug problem from the demand rather than the supply side.