Representatives of municipal councils shall be elected by secret ballot in general elections which may be arranged in one of two ways:
a. restricted elections by proportional representation, where elections are limited to candidates on electoral lists and representatives on each list are elected in proportion to the quantity of votes cast for the list;
b. unrestricted elections, where an election is not limited to declared candidates but rather all electors are eligible for election with the exception of those legally exempt from the obligation to serve and who have declared their refusal to serve prior to the election.
