West virginia constitution
Article VI: the legislature
Subsection C

(7) Neither house shall consider other appropriations until the budget bill has been finally acted upon by both houses, and no such other appropriations shall be valid except: in accordance with the provisions following (a) Every such appropriation shall be embodied in a separate bill limited to some single work, object, or purpose therein stated and called therein a supplementary appropriation bill; (b) each supplementary appropriation bill shall provide the revenue necessary to pay the appropriation thereby made by a tax, direct or indirect, to be laid and collected as directed in the bill unless it appears from such budget that there is sufficient revenue available.