Upon a determination of the assembly under HBC 7.04.030 that a service area is necessary, the assembly may by ordinance establish the service area, contingent upon approval of the ordinance by a majority vote of the voters within the proposed service area in a general or special election. The assembly may by ordinance abolish a service area, except that road maintenance, fire protection, or parks and recreation service areas require approval by a majority of voters residing in the service area prior to abolishment.