The Government of Bangladesh is overseen by a cabinet headed by the Prime Minister of Bangladesh. The tenure of a parliamentary government is five years. The Bangladesh Civil Service assists the cabinet in running the government. Recruitment for the civil service is based on a public examination. In theory, the civil service should be a meritocracy. But a disputed quota system coupled with politicisation and preference for seniority have allegedly affected the civil service's meritocracy. The President of Bangladesh is the ceremonial head of state whose powers include signing bills passed by parliament into law. The President is elected by the parliament and has a five-year term. Under the constitution, the president acts on the advice of the prime minister. The President is the Supreme Commander of the Bangladesh Armed Forces and the chancellor of all universities.