Also known as: activity that substantially affects interstate commerce · substantially affects interstate commerce · Commerce Clause substantial effects test · substantial effect on interstate commerce
Written by attorneys · grounded in primary & secondary sources — see below
Activities whose aggregate economic effects Congress may rationally conclude substantially impact interstate commerce. Regulation reaches purely intrastate conduct when the class of activity is economic or commercial in nature and forms part of a larger federal regulatory scheme.
Albert Allen grows marijuana plants in his backyard for personal medical use under a state program. Federal agents seize the plants under a nationwide drug-control statute. The activity counts as economic production that Congress may aggregate across many similar growers to establish a substantial effect on interstate drug markets.
Amelia Amari keeps a handgun in her desk at a local tutoring center. Prosecutors charge her under a federal statute that bans firearms at after-school facilities. The possession is noneconomic and intrastate, so it cannot be aggregated to show a substantial effect on interstate commerce.
Select any source to read its text and confirm it supports the definition.
Anita Ali sues her attacker in federal court under a statute creating a civil remedy for gender-motivated violence. The conduct occurs entirely within one state and lacks any commercial character. Courts treat the activity as noneconomic and therefore outside the substantial-effects category.
Andrew Avery operates a lumber mill that ships finished boards to buyers in other states. Federal inspectors apply minimum-wage rules to his in-state employees. The intrastate production is so integrated with interstate shipments that Congress may regulate local labor conditions to protect the national market.
Audrey Ashton declines to purchase health insurance. Congress requires her to pay a penalty collected with her income taxes. The decision not to buy insurance is treated as economic activity whose aggregate effects substantially affect interstate health-care markets.
Adrian Aguilar drives an overloaded truck on state highways while hauling goods for Arcadia Retail. State officials enforce federal weight standards. The local hauling forms part of an interstate supply chain whose aggregate effects on commerce justify federal regulation of intrastate segments.
Aggregation applies only when the regulated conduct is economic or commercial in nature. Courts examine whether many similar actors together would alter supply, demand, or prices in a national market. Noneconomic activity such as simple gun possession cannot be aggregated.
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Yes when the production is economic and substitutes for purchases that would otherwise occur in a national commodity market. The aggregate decisions of many farmers reduce overall demand and affect interstate prices even though no goods cross state lines.
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Marijuana cultivation is economic production that can be aggregated within a comprehensive federal drug-control scheme. Gun possession at a school is noneconomic conduct lacking any commercial character and therefore cannot be aggregated.
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Yes when homeowners produce electricity that replaces purchases from an interstate power grid. The aggregate withdrawal of demand alters prices and supply conditions in national energy markets.
Supporting sources
…activities having a substantial relation to interstate commerce, Jones & Laughlin Steel , 301 U. S., at 37, i. e. , those activities that substantially affect interstate commerce, Wirtz, supra , at 196, n. 27. Within this final category, admittedly, our case law has not been clear whether an activity must "affect" or "substantially affect" interstate commerce in…