W. Va. Code § 7-14D-17
Any deputy sheriff who became totally disabled as a result of illness or injury incurred in the line of duty prior to the effective date of this article may be a member of the plan at his or her election and is entitled to disability, death and retirement benefits under this article in lieu of any other disability, death or retirement benefits provided solely in conjunction with a retirement system of this state or his or her county of employment: Provided, That the deputy sheriff would have been eligible for disability under section fourteen of this article had that section been in effect at the time of the disability. The amounts of the benefits shall be determined as if the disability first commenced after the effective date of this article with monthly compensation equal to that average monthly compensation which the member was receiving in the plan year prior to the initial disability. For the purposes of this section, benefits paid pursuant to chapter twenty-three of this code are not death or retirement benefits provided solely in conjunction with a retirement system of this state or county of this state.
W. Va. Code § 7-14D-17