1. It has a supreme governing body constituted in one of the following ways: a. Assembly. — The supreme governing body is an assembly composed of delegates elected directly by the members or at intermediate assemblies or conventions of members or their representatives, together with other delegates as may be prescribed in the society’s laws. A society may provide for election of delegates by mail. The elected delegates shall constitute a majority in number and shall not have less than two-thirds of the votes and not less than the number of votes required to amend the society’s laws. The assembly shall be elected, meet at least once every four years, and elect a board of directors to conduct the business of the society between meetings of the assembly. Vacancies on the board of directors between elections may be filled in the manner prescribed by the society’s laws. b. Direct election. — The supreme governing body is a board composed of persons elected by the members, either directly or by their representatives in intermediate assemblies, and any other persons prescribed in the society’s laws. A society may provide for election of the board by mail. Each term of a board member may not exceed four years. Vacancies on the board between elections may be filled in the manner prescribed by the society’s laws. Those persons elected to the board shall constitute a majority in number and not less than the number of votes required to amend the society’s laws. A person filling the unexpired term of an elected board member shall be considered to be an elected member. The board shall meet at least quarterly to conduct the business of the society.