W. Va. Code § 8-19-10
Any such municipality or county commission may enter into contracts or agreements with any persons for (1) the repair, maintenance and operation and management of the facilities and properties of said waterworks or electric power system, or any part thereof, or (2) the collection and disbursement of the income and revenues therefor, or for both (1) and (2), for such period of time and under such terms and conditions as shall be agreed upon between such municipality or county commission and such persons. Any such municipality or county commission shall have plenary power and authority to provide in the ordinance or order authorizing the issuance of bonds hereunder, or in any trust indenture securing such bonds, that such contracts or agreements shall be valid and binding upon the municipality and county commission as long as any of said bonds, or interest thereon, is outstanding and unpaid.
W. Va. Code § 8-19-10