(c) A tie between or among the highest ranking sangguniang members shall be resolved by the drawing of lots. (d) The successors as defined herein shall serve only the unexpired terms of their predecessors. For purposes of this Chapter, a permanent vacancy arises when an elective local official fills a higher vacant office, refuses to assume office, fails to qualify, dies, is removed from office, voluntarily resigns, or is otherwise permanently incapacitated to discharge the functions of his office. For purposes of succession as provided in this Chapter, ranking in the sanggunian shall be determined on the basis of the proportion of votes obtained by each winning candidate to the total number of registered voters in each distribution the immediately preceding election." In the same vein, Article 83 of the Rules and Regulations Implementing, the Local Government Code of 1991 provides: "x x x. "ART. 83. Vacancies and Succession of Elective Local Officials.(a) What constitutes permanent vacancy - A permanent vacancy arises when an elective local official fills a higher vacant office, refuses to assume office, fails to qualify, dies, is removed from office, voluntarily resigns, or is otherwise permanently incapacitated to discharge the functions of his office. (b) Permanent vacancies in the offices of the governor, vice governor, mayor and vice mayor (1) If a permanent vacancy occurs in the office of the governor or mayor, the vice governor or vice mayor concerned shall ipso facto become the governor or mayor. If a permanent vacancy occurs in the offices of the governor, vice governor, mayor, or vice mayor, the highest ranking sanggunian member or, in case of his permanent inability, the second highest ranking sanggunian member, shall ipso facto become the governor, vice governor, mayor or vice mayor, as the

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