Members of the Legislature shall, before they enter on the duties of their respective offices, take and subscribe the following oath or affirmation: "I do solemnly swear (or affirm) that I will support the Constitution of the United States and the Constitution of the State of New Jersey, and that I will faithfully discharge the duties of Senator (or member of the General Assembly) according to the best of my ability." Members-elect of the Senate or General Assembly are empowered to administer said oath or affirmation to each other.