W. Va. Code § 11B-2-21

If the Governor determines that the amounts, or parts thereof, appropriated from the general revenue cannot be expended without creating an overdraft or deficit in the General Fund, he or she may, before the end of the fiscal year, instruct the secretary to reduce all appropriations out of general revenue in a degree as necessary to prevent an overdraft or a deficit in the General Fund. No reduction of appropriations may be made after June 30 of the fiscal year.