The council shall have the power to provide for continuity of government of the town of Breckenridge in the event of natural or enemy caused disaster. Such power shall be employed in a manner in which will preserve representative government in the town of Breckenridge and which will provide an orderly line of succession of officers, notwithstanding the provisions of this charter. Such succession shall commence with the mayor and the mayor pro tem and shall then revert to the councilmen by order of seniority, and thereafter, through an orderly line of succession of the administrative department heads, commencing with the town manager.