Also known as: substantially affect · substantially affected · substantially affecting · substantial effect · substantial effects · substantial effects test · substantially affects interstate commerce
Written by attorneys · grounded in primary & secondary sources — see below
A standard for determining whether Congress may regulate an activity under the Commerce Clause. The test asks whether the activity has a significant impact on interstate commerce, permitting aggregation when the activity is economic or commercial in nature.
Sarah Sullivan grows cannabis plants in her backyard under a state medical program. Federal agents seize the plants under a nationwide drug-control statute. A court aggregates the effects of similar home cultivation across the country and upholds the seizure because the activity is economic and substantially affects interstate drug markets.
Sydney Santos cultivates a small amount of a controlled substance on private land for personal medical use. Federal agents enforce a nationwide production quota statute. A court aggregates similar local activity and finds the conduct substantially affects interstate drug markets, upholding federal regulation.
Select any source to read its text and confirm it supports the definition.
Spencer Silver carries a handgun onto school grounds for personal protection. Prosecutors charge him under a federal statute. The court dismisses the charge because simple intrastate gun possession is non-economic and lacks a direct substantial effect on interstate commerce that could be aggregated.
Sofia Stern sues her attacker under a federal civil remedy for gender-motivated violence. The court strikes down the provision because the regulated conduct is non-economic and does not substantially affect interstate commerce under the four-factor Lopez test.
Sean Steele grows a regulated commodity on his land solely for on-site consumption. Federal agents fine him for exceeding production limits. The court upholds the fine because aggregate local production substantially affects national prices and interstate commerce.
Simon Stern grows wheat on his farm solely for family consumption. Federal regulators fine him for exceeding his quota. The court upholds the penalty because the aggregate effect of such production substantially affects national wheat prices and interstate commerce.
The activity must be economic or commercial in nature. Non-economic conduct cannot be aggregated under the Lopez framework even if it has some connection to interstate markets.
It confines regulation to activities with a meaningful impact on interstate commerce when aggregated, preserving the distinction between national and purely local matters.
No. When the cultivation is economic and part of a comprehensive federal scheme controlling interstate trafficking, courts may aggregate its effects and uphold regulation.
…539 U.S., at 578. Although Bowers was eventually repudiated in Lawrence , men and women were harmed in the interim, and the substantial effects of these injuries no doubt lingered long after Bowers was overruled. Dignitary wounds cannot always be healed with the stroke of a pen. A ruling against same-sex couples would have the…