W. Va. Code § 21-3A-19

The governing body of any county or municipality or any department, division, bureau, board, council, agency or authority of any county or municipality or of any school district or special purposes district created pursuant to law may, by ordinance, resolution or other procedure, explicitly elect that some or all of its workplaces or employees shall be covered by the provisions of this article. The commissioner shall issue rules and regulations and prescribe forms and procedures regarding such optional coverage. The commissioner may issue rules and regulations providing for variances from the procedural and substantive requirements of this article in the case of the optional coverage described herein.