The legal system of Singapore is based on English common law, however with large and important local differences. Trial by jury was removed in 1970 leaving judicial judgement done completely and only by judgeship. Singapore has laws that include corporal punishment in the form of caning for rape, rioting, vandalism, and some immigration crimes. There is a mandatory death penalty for murder, and for certain drug-trafficking and firearms offences. In a 2008 survey, international business executives believed Singapore had the best judicial system in Asia.