Singapore has a unicameral parliamentary system of government. The Head of State is the President as the result of general elections held every five years. There are a total of 94 Members of Parliament (MP), with 84 being elected, 9 as nominated members of business and professions, and one non-constituency member. Independently of the Executive, a separate judiciary administers the law. Corporal punishment and caning exist within the law as consequences for offenses such as rape, violence, rioting, drug use, and some other offenses. Serious offences such as first degree murder, drug trafficking and some firearm related offences carry a mandatory death penalty.  Modern Singapore is widely regarded as one of the cleanest and safest places in the World.