The Constitution requires that before the Major Executive "enter the execution of their office", they must take the Oath of Office, which must be given by a citizen of the Triumvirate and must be witnessed by at least three others. The oath goes:
"I do solemnly swear that I will faithfully execute the office of Major Executive of the Universal Triumvirate, and will to the best of my ability preserve, protect, and defend the ideals and the Constitution of the Universal Triumvirate"
Often the Major Executive will add their name in after the first "I".
The Oath is usually delivered by someone significant to the process, such as the Chief Justice, a political opponent, or a friend of the incoming Major Executive.