Brief Fact Summary. Congress passed a law that imposed a federal excise tax on employers of child labor. A company brought a suit for refund of taxes paid.
Synopsis of Rule of Law. Congress cannot use their power to tax in order to regulate.
Held. No. Congress is not validly exercising its taxing power when it imposes a tax with a prohibitory and regulatory effect and purpose. It is irrelevant that the taxes are also generating revenue. Attempting to regulate local behavior, such as the employment of children under certain conditions, through a tax is an impermissible use of power.
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Discussion. Not all revenue-generating measures passed by Congress are valid taxes. A regulation under the guise of a tax is an improper use of the taxing power and will be held invalid.