111. However, if
(a) the election of mayor and councillors has not taken place within the time prescribed by this Act or, the election having taken place, an insufficient number of members of the council has been elected;
(b) by reason of vacancies, there remains less than a quorum of the members of the council in office; or
(c) (paragraph repealed);
(d) the council has not availed itself of the provisions of section 110,
notice thereof must be sent forthwith by the secretary-treasurer to the Regional Government. Proceedings for a new election to fill the vacancies must then be commenced immediately. Such election must be conducted in the same manner as a general election, with the necessary modifications. Subsection 4 of section 83, adapted as required, applies to the election. However, if the event making the new election necessary occurs more than 12 months after the end of the last revision of the electoral list in force, the list shall be revised within 15 days after publication of the notice of election and the nomination of candidates shall be held one week after the end of the revision period.