W. Va. Code § 5-10-16: When and how political subdivision becomes participating public employer.

The state of West Virginia shall become a participating public employer effective July 1, 1961. Any other political subdivision may by a three-fifths vote of its governing body, or by a majority vote of its electors, elect to become a participating public employer and thereby include its employees in the membership of the retirement system. It shall be the duty of the clerk or secretary of each such political subdivision electing to become a participating public employer to certify the determination of the political subdivision to the board of trustees within ten days from and after the vote of the governing body or the canvass of votes upon such action.