Belco Petroleum Corp. v. State Bd. of Equal‪.‬

This appeal arises from a review by the district court of an administrative hearing conducted by the State Board of Equalization (hereinafter Board), wherein the Board denied any relief to the appellant, Belco Petroleum Company (hereinafter Belco), which company claimed that an increase in the severance tax enacted by the Wyoming Legislature in 1975 could not be applied to Belcos tax liability for the year 1975 because to so apply the increase would be to give the 1975 tax increase an illegal and unconstitutional retroactive effect. The district court affirmed the Board. The issues, as set out by Belco, are: