 The police force within Vatican City, known as the Corps of Gendarmerie of Vatican City, belongs to the city state, not to the Holy See.Holy See signed the UN treaty on the Prohibition of Nuclear Weapons, a binding agreement for negotiations for the total elimination of nuclear weapons.The difference between the two coats of arms is that the arms of the Holy See have the gold key in bend and the silver key in bend sinister (as in the sede vacante coat of arms and in the external ornaments of the papal coats of arms of individual popes), while the reversed arrangement of the keys was chosen for the arms of the newly founded Vatican City State in 1929.