Delegated rulemaking (also called administrative rulemaking or secondary legislation) refers to the authority that a legislature grants to executive-branch agencies, ministries, or independent commissions to issue legally binding rules that implement, interpret, or operationalize a statute. Because modern statutes often address technically complex areas — environmental standards, financial capital requirements, drug approvals, telecommunications spectrum — legislatures typically draft broad goals and delegate the detailed standard-setting to specialized bodies.
In the United States, the framework is set by the Administrative Procedure Act (APA) of 1946, which establishes "notice-and-comment" rulemaking under §553: agencies publish proposed rules in the Federal Register, accept public comments, and issue a final rule with a reasoned response. Final rules are codified in the Code of Federal Regulations. Major rules are also subject to review by the Office of Information and Regulatory Affairs (OIRA) under Executive Order 12866 (1993) and to congressional disapproval under the Congressional Review Act of 1996.
Courts police the boundaries of delegation. The U.S. Supreme Court historically deferred to agency interpretations of ambiguous statutes under Chevron U.S.A. v. NRDC (1984), but overruled that doctrine in Loper Bright Enterprises v. Raimondo (2024). The Court has also revived the "major questions doctrine" in West Virginia v. EPA (2022), requiring clear congressional authorization for rules of vast economic or political significance. The older "nondelegation doctrine" — last used to strike down statutes in 1935 — limits how much legislative power Congress may transfer.
Other systems use parallel mechanisms:
- United Kingdom: statutory instruments made under "parent" Acts of Parliament.
- European Union: delegated acts (Article 290 TFEU) and implementing acts (Article 291 TFEU) by the European Commission.
- India: subordinate legislation under enabling statutes, reviewed by parliamentary committees.
Delegated rulemaking is central to debates over the "administrative state," democratic accountability, and regulatory efficiency.
Example
In 2024, the U.S. Environmental Protection Agency used delegated rulemaking under the Clean Air Act to finalize tailpipe emissions standards for model-year 2027–2032 light-duty vehicles after a public notice-and-comment period.
Frequently asked questions
Legislation is enacted by the legislature itself; delegated rulemaking is carried out by executive agencies under authority that a statute grants them, and the resulting rules must stay within the statute's scope.
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