The corporate boundaries shall be those existing at the time of ratification of this Charter, as set forth on the official map of the Village and as they may be altered from time to time in accordance with law. An official map of the Village, showing the current municipal boundaries, shall be maintained permanently in the office of the Village Clerk and shall be available for public inspection. Upon alteration of the corporate limits pursuant to law, the appropriate changes to the official map shall be made and copies shall be filed in the offices of the Secretary of State, the Brunswick County Register of Deeds, and the appropriate board of elections.