Article 6 Mayor and deputy mayor
(1)
A city or town mayor or a deputy city or town mayor shall (unless he ceases to be a charter trustee) hold office until immediately after the election of a city or town mayor at the next annual meeting.
(2)
On a casual vacancy occurring in the office of city or town mayor or deputy city or town mayor the charter trustees shall, as soon as practicable, meet for the election of one of their number to such office and any trustee so elected shall (subject to the provisions of the Act or this order) hold office until the time specified in paragraph (1) above and shall then retire.