Executive authority is vested in a collegiate government comprising the head of government (prime minister) and four government councillors (ministers). The head of government and the other ministers are appointed by the Prince upon the proposal of parliament and with its concurrence, and reflect the balance of parties in parliament. The constitution stipulates that at least two government members be chosen from each of the two regions. The members of the government are collectively and individually responsible to parliament; parliament may ask the Prince to remove an individual minister or the entire government.