Also known as: substantially affects commerce · substantial effect on commerce · substantially affect interstate commerce · Commerce Clause · affecting commerce
Written by attorneys · grounded in primary & secondary sources — see below
A category of intrastate activity that Congress may regulate under the Commerce Clause when the activity, viewed in the aggregate, exerts a substantial effect on interstate commerce.
Congress enacts a statute prohibiting interstate shipment of live baitfish from states lacking approved inspection programs. A Maine supplier challenges the federal ban. The court upholds the statute because the aggregate movement of invasive species substantially affects interstate commerce in fisheries and tourism.
Congress passes legislation allowing states to impose higher fees on out-of-state hazardous waste only after finding substantial aggregate effects on interstate waste markets. An out-of-state generator sues. The court sustains the federal authorization because the regulated activity substantially affects interstate commerce.
Select any source to read its text and confirm it supports the definition.
Congress authorizes local flow-control ordinances for solid waste after determining that unregulated interstate waste traffic substantially affects national markets. Private haulers challenge a county rule. The court upholds the federal statute and local ordinance under the substantial-effects category.
Congress extends FLSA overtime rules to state employees after finding that labor conditions in the aggregate substantially affect interstate commerce. A state highway department objects. The court rejects the challenge, confirming that the substantial-effects rationale supports the federal regulation.
Congress enacts a statute permitting state nuclear-waste surcharges after determining that interstate waste disposal substantially affects commerce. A generator contests the fees. The court upholds the federal authorization because the targeted activity substantially affects interstate commerce.
A farmer grows wheat solely for on-farm consumption and exceeds his federal acreage allotment. Federal agents seize the excess crop under a national production-control program. The court sustains the regulation because the aggregate effect of such local production substantially affects interstate wheat markets and prices.
Congress must demonstrate that the regulated activity, taken in the aggregate, has a substantial effect on interstate commerce. Courts defer to reasonable congressional judgments about those effects even without formal findings.
Supporting sources
No. The category reaches noncommercial intrastate conduct when its aggregate impact on interstate commerce is substantial, as illustrated by home consumption of wheat in Wickard.
Supporting sources
The channels and instrumentalities categories allow regulation of the highways, airways, and things moving in commerce regardless of substantial effect. The substantially affecting category instead focuses on the economic impact of the targeted activity itself.
Supporting sources
…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…