Also known as: substantially affect interstate commerce · substantial effect on interstate commerce · substantially affecting interstate commerce · substantial effects test · Commerce Clause effects prong
Written by attorneys · grounded in primary & secondary sources — see below
A constitutional test under the Commerce Clause that determines whether Congress may regulate an activity. The test asks whether the regulated activity is economic or commercial in nature and whether that class of activity, considered in the aggregate, exerts a substantial effect on interstate commerce.
Select any source to read its text and confirm it supports the definition.
Selena Singh grows marijuana plants in her backyard solely for personal medical use under a state program. Federal agents seize the plants under a nationwide drug-control statute. The court upholds the seizure because the intrastate cultivation belongs to a class of economic activity whose aggregate effects on the national drug market permit federal regulation.
Simon Stern carries an unloaded handgun in his car while dropping his child at a local elementary school. Federal prosecutors charge him under a statute criminalizing firearm possession near schools. The court dismisses the charge because the noneconomic, intrastate conduct lacks a direct substantial effect on interstate commerce and cannot be aggregated.
Samantha Stone sues her assailant in federal court under a statute providing a civil remedy for gender-based violence. The defendant moves to dismiss, arguing the statute exceeds Congress's commerce power. The court grants the motion because the regulated conduct is noneconomic and its connection to interstate commerce is too attenuated to support aggregation.
Sterling Manufacturing pays its assembly-line workers below the federal minimum wage. The Department of Labor sues to enforce the Fair Labor Standards Act. The court upholds the application because the production of goods destined for interstate shipment substantially affects interstate commerce even though the wages are paid locally.
Sterling Dynamics operates tractor-trailers exceeding state length limits on South Carolina highways. State officials ticket the drivers under a statute regulating truck dimensions. The court sustains the statute because the length of trucks traveling on state roads substantially affects the flow of interstate commerce.
Santiago Sanchez refuses to purchase health insurance and is assessed a penalty under federal law. He sues, claiming the mandate exceeds Congress's commerce power. The court upholds the exaction as a tax rather than a regulation of inactivity under the commerce power, thereby avoiding the substantial-effects question.
Aggregation is permitted when the regulated activity is economic or commercial in nature. Courts then consider the cumulative impact of the entire class of similar conduct rather than any single instance. Noneconomic activity generally cannot be aggregated under this approach.
Supporting sources
…by the rest of the Constitution. Art. I, § 1. Where the Constitution was meant to grant federal authority over an activity substantially affecting interstate commerce, the Constitution contains an enumerated power over that particular activity. Indeed, the Framers knew that many of the other enumerated powers in § 8 dealt with matters that substantially…
…interstate commerce or persons or things in
…Act and the National Labor Relations Act, which recognize congressional power to regulate intrastate activities that have a substantial effect on interstate commerce
…regulations of activities that arise out of or are connected with a commercial transaction, which viewed in the aggregate, substantially affects interstate commerce.” 514 U. S., at 561. The statutory scheme that the Government is defending in this litigation is at the opposite end of the regulatory spectrum. As explained above, the CSA, enacted in…
…constitutional questions. For example, we would have to evaluate the precise object or activity that, in the aggregate,
No. The test requires economic activity that can be aggregated. Purely noneconomic, intrastate conduct such as simple firearm possession lacks the required commercial character and cannot be aggregated to establish a substantial effect on interstate commerce.
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When Congress enacts a broad regulatory program addressing an interstate market, it may reach intrastate economic activity that is an essential part of that scheme. The activity need not itself cross state lines if its regulation is necessary to prevent undercutting of the overall program.
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Findings may help demonstrate a rational basis for concluding that the regulated activity substantially affects interstate commerce. They are not conclusive, however, and courts independently assess whether the activity is economic and whether its aggregate effects are substantial.
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