Article 64 of the Belgian constitution sets forth four qualifications for representatives: each representative must be at least 21 years old, possess the Belgian nationality, have the full enjoyment of civil and political rights, and be resident in Belgium. A representative can only enter into office after having taken the oath of office, in either of the three official languages in Belgium: Dutch, French or German. He or she can also choose to take the oath in more than one language. The oath of office is as follows: ""I swear to observe the Constitution"". (, , )