W. Va. Code § 20-18-6
(a) Any Natural Resources Police Officer first employed in covered employment after the effective date of this article shall be a member of this retirement system and does not qualify for membership in any other retirement system administered by the board, so long as he or she remains employed in covered employment: Provided, That any Natural Resources Police Officer who has concurrent employment in an additional job or jobs which would require the Natural Resources Police Officer to be a member of the West Virginia Deputy Sheriff Retirement System, West Virginia Municipal Police Officers and Firefighters Retirement System or the West Virginia Emergency Medical Services Retirement System shall participate in only one retirement system administered by the board, and the retirement system applicable to the concurrent employment for which the employee has the earliest date of hire shall prevail. The membership of any person in the plan ceases: