Also known as: substantially affects · substantially affected · substantially affecting · substantial effect · substantial effects test · substantially affects interstate commerce
Written by attorneys · grounded in primary & secondary sources — see below
3 senses
An activity that Congress may regulate under the Commerce Clause because it bears a substantial relation to interstate commerce. Courts determine whether an intrastate activity substantially affects interstate commerce by examining whether the activity is economic or commercial in nature and whether its effects may be aggregated within a comprehensive federal regulatory scheme.
A standard used to classify a legal rule as substantive rather than procedural for Erie purposes. A rule is substantive when failure to apply it in federal court would produce an outcome materially different from the result that would obtain in state court.
A financial or other interest that could be materially altered by the outcome of a proceeding. A judge must disqualify when the judge, the judge's spouse, or a minor child residing in the household possesses such an interest in a party or the subject matter of the case.
Each sense below has its own examples, sources, and questions.
An activity that Congress may regulate under the Commerce Clause because it bears a substantial relation to interstate commerce. Courts determine whether an intrastate activity substantially affects interstate commerce by examining whether the activity is economic or commercial in nature and whether its effects may be aggregated within a comprehensive federal regulatory scheme.
Select any source to read its text and confirm it supports the definition.
Sasha Stone grows cannabis plants in her backyard under a state medical program. Federal agents seize the plants under a nationwide drug-control statute. The court aggregates the economic effects of similar intrastate cultivation and holds that the activity substantially affects interstate drug markets, allowing federal regulation.
Sylvia Santos carries a handgun onto school grounds for personal protection. Prosecutors charge her under a federal statute banning such possession. The court holds that the non-economic, intrastate activity does not substantially affect interstate commerce and cannot be aggregated, rendering the statute invalid.
Seth Shapiro is sued under a federal civil remedy for gender-motivated assault. The defendant argues the statute exceeds commerce power. The court concludes that the regulated conduct is non-economic and lacks a substantial effect on interstate commerce even when aggregated, so the remedy is invalid.
Congress may regulate when the activity is economic or commercial and its effects can be aggregated within a comprehensive federal scheme. Non-economic activity such as simple gun possession cannot be aggregated even if it affects commerce in some attenuated way.
Supporting sources
The activity was non-economic and intrastate. The Court refused to aggregate its effects because doing so would obliterate the distinction between national and local authority.
Supporting sources
A standard used to classify a legal rule as substantive rather than procedural for Erie purposes. A rule is substantive when failure to apply it in federal court would produce an outcome materially different from the result that would obtain in state court.
Select any source to read its text and confirm it supports the definition.
Steven Silva files a personal-injury suit in federal court under diversity jurisdiction after the state limitations period has expired but within a federal tolling rule. The court applies the state rule because ignoring it would substantially affect the outcome by allowing a claim that state court would dismiss.
A rule is substantive if applying federal law instead of state law would produce a materially different result. Statutes of limitations and tolling rules are classic examples because they determine whether a claim survives.
Supporting sources
A financial or other interest that could be materially altered by the outcome of a proceeding. A judge must disqualify when the judge, the judge's spouse, or a minor child residing in the household possesses such an interest in a party or the subject matter of the case.
Select any source to read its text and confirm it supports the definition.
Sydney Santos, an independent counsel, investigates a high official. The official claims the appointment substantially affects the balance of executive power. The court examines whether the statutory mechanism deprives the President of substantial control over prosecutorial functions.
A judge must recuse when the judge, spouse, or minor child has an interest that could be substantially affected by the outcome. Even a modest ownership stake may qualify if the proceeding could materially alter its value.
Supporting sources
…commerce. Thus, if § 922(q) is to be sustained, it must be under the third category as a regulation of an activity that substantially affects interstate commerce. First, we have upheld a wide variety of congressional Acts regulating intrastate economic activity where we have concluded that the activity substantially affected interstate commerce.…
…deprive the President of substantial control over the prosecutory functions performed by the independent counsel, and it does
…interstate commerce or persons or things in
…properly have considered that wheat consumed on the farm where grown, if wholly outside the scheme of regulation, would have a substantial effect in defeating and obstructing its purpose to stimulate trade therein at increased prices. It is said, however, that this Act, forcing some farmers into the market to buy what they could…
…the Anti-Trust Act.” 268 U.S. p. 310. And the existence of that intent may be a necessary inference from proof of the direct and substantial effect
Stella Shapiro, a bakery owner, is prosecuted for violating a state maximum-hours law. The Court holds that the regulation of hours in a local manufacturing business does not substantially affect interstate commerce and therefore lies beyond federal or analogous state power under the prevailing doctrine.
Yes, when the cultivation is part of a larger economic market and the federal statute is a comprehensive regulatory scheme. Aggregation is permitted because the activity is economic.
Supporting sources