Also known as: Dormant Commerce Clause
Written by attorneys · grounded in primary & secondary sources — see below
A constitutional principle inferred from the Commerce Clause that invalidates state and local laws discriminating against or unduly burdening interstate commerce even when Congress has taken no action under its affirmative commerce power.
Select any source to read its text and confirm it supports the definition.
Nora Nash operates a bait shop near the Maine border and seeks to import live baitfish from New Hampshire suppliers. Maine enforces a statute barring all out-of-state live baitfish to safeguard native fish populations from parasites. Nora's shipments are blocked at the border while in-state hatcheries continue operations. The ban survives review because it advances a legitimate non-economic ecological interest without reasonable nondiscriminatory alternatives.
Northern Manufacturing generates hazardous waste at its Ohio plant and contracts with a Pennsylvania landfill for disposal. Pennsylvania imposes a per-ton surcharge on out-of-state waste that doubles the fee charged to in-state generators. Northern pays the higher rate under protest and loses the contract to a local competitor. The differential fee is invalid because it discriminates on the basis of waste origin without congressional authorization.
Nyah Ndlovu owns an Oregon winery that wants to ship cases directly to consumers in Michigan. Michigan permits in-state wineries to make such shipments but requires out-of-state wineries to sell only through licensed wholesalers. Nyah loses direct-sales revenue while Michigan producers retain the advantage. The restriction violates the dormant Commerce Clause because it constitutes economic protectionism not saved by the Twenty-First Amendment.
Nestor Navarro runs a Virginia scrap-metal yard that offers higher prices to in-state residents than to out-of-state sellers. The state buys scrap exclusively from local suppliers at the premium rate and rejects lower bids from Maryland dealers. Navarro's out-of-state competitors receive less favorable terms solely because of their location. The preference is permissible because the state is participating in the market rather than regulating it.
Nordic Ventures operates a private recycling facility in New York and seeks contracts with local municipalities. A county ordinance requires all solid waste to be delivered to a publicly owned processing plant. Nordic loses the contracts and must close a line of business. The ordinance receives lenient review and is upheld because it favors a government facility performing a traditional public function rather than private economic interests.
Neptune Energy ships spent nuclear fuel from its Illinois reactor to a disposal site in South Carolina. South Carolina levies a surcharge on out-of-state nuclear waste pursuant to an express federal statute permitting such fees. Neptune pays the surcharge and passes the cost to customers. The fee does not violate the dormant Commerce Clause because Congress has expressly authorized the discrimination.
The dormant Commerce Clause applies when Congress has not acted and invalidates state laws that discriminate against or unduly burden interstate commerce. Preemption occurs only when Congress has enacted legislation that conflicts with or occupies the field of state regulation under the Supremacy Clause.
Supporting sources
A facially discriminatory law may survive if it serves a legitimate and important non-economic local interest such as protecting ecological resources and there are no reasonable nondiscriminatory alternatives available to the state.
…of federal regulation under the commerce power. When cases involving these laws first reached this Court, we imported from our negative Commerce Clause cases the approach that Congress could not regulate activities such as "production," "manufacturing," and "mining." See, e. g. , United States v. E. C. Knight Co. , 156 U. S. 1, 12 (1895)…
…the state law preempted. Cf. Southern Pacific Co. v. Arizona ex rel. Sullivan , 325 U. S. 761, 768-769 (1945) (under negative Commerce Clause
…As we explained in a case decided more than a decade after LaRue , although the Twenty-first Amendment limits the effect of the dormant Commerce Clause
…government apart from a typical private business. Cf. Tracy, supra , at 313 (Scalia, J., concurring) (“Nothing in this Court’s
…in protecting regionally based corporations from acquisition by foreign corporations). Moreover, the Court has held in the dormant Commerce Clause
Yes. When a state acts as a buyer or seller in the market rather than as a regulator it may favor in-state residents in its commercial dealings without violating the dormant Commerce Clause.
When Congress expressly authorizes states to impose discriminatory surcharges or other restrictions on out-of-state goods or services the state action does not violate the dormant Commerce Clause.
A flow-control ordinance favoring a government-owned facility performing a traditional public function receives more lenient review and is likely upheld because the favoritism is presumed to serve legitimate public objectives rather than economic protectionism.