With the entry into force of the Constitution of 1862, the Government initially consisted of a National Administrator (Landesverweser) and two National Councillors (Landräte), with the addition of two Deputy National Councillors in 1871. The Constitution of 1921 introduced new titles: The National Administrator became the Prime Minister (Regierungschef), and the National Councillors became Ministers (Regierungsräte). The Prime Minister was also assigned a Deputy. The current composition of the Government, consisting of a Prime Minister and four Ministers, one of whom also serves as Deputy Prime Minister, was introduced in 1965.