Nev. Rev. Stat. § 286.370
1. Employees whose membership in a previously established retirement system excludes them from membership in the System established by this chapter may apply to the Board in writing for the former system to be integrated into the latter System and for them to become members of the latter System. Whenever two-thirds of them and their employer, through its governing body, chief official or department head so apply, the Board may:
[9(1):181:1947; 1943 NCL § 5230.09]