W. Va. Code § 21A-7-17
The decision of the board shall be final and benefits shall be paid or denied in accordance therewith, unless a claimant, last employer, or other interested party appeals to the Intermediate Court of Appeals within 30 days after mailing of notification of the board's decision: Provided, That, in cases relating to a disqualification under § 21A-6-3(4) of this code, the decision of the board shall be final and benefits shall be paid or denied in accordance therewith, unless a claimant, last employer, or other interested party appeals to the Intermediate Court of Appeals within 20 days after mailing of notification of the board's decision.
Parties to the proceedings before the board shall be made defendants in any such appeal; and the commissioner shall be an interested party with the discretionary authority to appear in any such judicial review.
W. Va. Code § 21A-7-17