Whenever a majority of the full-time instructional and administrative employees of a county or state Board of Education, or a majority of the full-time nonteaching employees of such board shall indicate in writing to the board of Education that it has adopted a group plan or plans of insurance for life, health and accident, hospitalization or surgery insurance, or death benefit plan on a group basis, and such majority has selected a licensed insurance company or companies duly licensed to do business in this state to write or provide for any one or more of such group insurance, or death benefit coverages, the board shall make proper periodical premium deductions from the regular salary of any such employee as specified in a written assignment furnished it by each such employee subscribing thereto, and pay the aggregate of such salary deductions over to the insurance company or companies or voluntary association so selected. Only those companies whose plan or plans receive the majority vote shall have the privilege of such deductions.