A problem of a different order is presented where the tax itself has the effect of suppressing an activity or where it is coupled with regulations which clearly have no possible relation to the collection of the tax. Where a tax is imposed unconditionally, so that no other purpose appears on the face of the statute, the Court has refused to inquire into the motives of the lawmakers and has sustained the tax despite its prohibitive proportions.[266] In the language of a recent opinion: "It is beyond serious question that a tax does not cease to be valid merely because it regulates, discourages, or even definitely deters the activities taxed. * * * The principle applies even though the revenue obtained is obviously negligible, * * *, or the revenue purpose of the tax may be secondary, * * * Nor does a tax statute necessarily fall because it touches on activities which Congress might not otherwise regulate. As was pointed out in Magnano Co. _v._ Hamilton, 292 U.S. 40, 47 (1934): 'From the beginning of our government, the courts have sustained taxes although imposed with the collateral intent of effecting ulterior ends which, considered apart, were beyond the constitutional power of the lawmakers to realize by legislation directly addressed to their accomplishment.'"[267] But where the tax is conditional, and may be avoided by compliance with regulations set out in the statute, the validity of the measure is determined by the power of Congress to regulate the subject matter. If the regulations are within the competence of Congress, apart from its power to tax, the exaction is sustained as an appropriate sanction for making them effective;[268] otherwise it is invalid.[269] During the Prohibition Era, Congress levied a heavy tax upon liquor dealers who operated in violation of State law. In United States _v._ Constantine[270] the Court held that this tax was unenforceable after the repeal of the Eighteenth Amendment, since the National Government had no power to impose an additional penalty for infractions of State law. The Protective Tariff