The Municipality shall have the same boundaries as exist on the effective date of this Charter, with the power and authority to change its boundaries, and to annex territory to the Municipality in the manner authorized by the general laws of the State of Ohio, except that no territory shall be detached from the Municipality, nor shall the Municipality be annexed to, or merged with, any other body politic, nor shall the corporate existence of the Municipality be terminated, without the consent of the Council of the Municipality and of two-thirds of the electors on such question at a general election.