W. Va. Code § 8-22-20
(b) The actuarial valuation report provided pursuant to subsection (a) of this section shall consist of, but is not limited to, the following disclosures:
(c)
(1) Except as provided in subsections (e), (f), and (g) of this section, beginning June 30, 1991, and thereafter, the financial objective of each municipality shall not be less than to contribute to the fund annually an amount which, together with the contributions from the members and, if no pension funding revenue bonds of a building commission of such municipality are outstanding, the allocable portion of the Municipal Pensions and Protection Fund for municipal pension and relief funds established under §33-3-14d of this code or a municipality’s allocation from the Municipal Pensions Security Fund created in §8-22-18b of this code and other income sources as authorized by law will be sufficient to meet the normal cost of the fund and amortize any actuarial deficiency over a period of not more than forty years beginning from July 1, 1991: Provided, That in the fiscal year ending June 30, 1991, the municipality may elect to make its annual contribution to the fund using an alternative contribution in an amount not less than:
(e)
(f)
(g)
(i) New gains or losses on assets and liabilities; and (ii) changes in actuarial assumptions, shall each be amortized over a closed period of 15 years, thereby creating layers of amortization bases rather than amortizing the entire actuarial deficiency over the same single and decreasing period: Provided, however, That impacts on the funding deficiency due to plan changes shall be amortized over closed five year periods. The management of these amortization bases by the actuary should entail the consideration, at least every five years, of whether to implement strategies, such as the synchronization of certain amortization layers, to help avoid volatility to the sum of the amortization payments generally resulting from the expiration of charge and credit layers at different times. The required contribution shall be determined each plan year as described above by the actuary retained by the oversight board, based on an actuarial valuation reflecting actual demographic and investment experience and consistent with the Actuarial Standards of Practice published by the Actuarial Standards Board.