Federal administrative agencies are the specialized bodies Congress creates to write, enforce, and interpret the detailed regulations that govern American life, from workplace safety to securities markets to drinking water standards. Often called the “fourth branch” of government, they sit alongside the legislative, executive, and judicial branches and combine powers borrowed from all three. Each agency exists because Congress passed a statute giving it authority over a defined subject area that demands more technical expertise and day-to-day attention than Congress itself can provide. Recent Supreme Court decisions have narrowed that authority in significant ways, making 2026 a particularly active moment in administrative law.
How Agencies Come Into Existence
Every federal agency traces its legal existence to a specific statute, commonly called an enabling act. That statute defines the agency’s jurisdiction, spells out its powers, and sets the boundaries it cannot cross. The Department of Labor, for example, was established by statute as an executive department with a Secretary appointed by the President and confirmed by the Senate.1Office of the Law Revision Counsel. 29 USC Ch 12 – Department of Labor The Clean Air Act of 1970 gave the Environmental Protection Agency authority to regulate air pollutants. The founding statute is what separates a lawful agency from an unauthorized power grab.
This delegation has a constitutional ceiling. The Supreme Court requires that whenever Congress hands off authority to an agency, the statute must include an “intelligible principle” guiding how the agency should exercise it.2Congress.gov. ArtI.S1.5.3 Origin of Intelligible Principle Standard In practice, the Court has applied this standard generously, striking down statutes for excessive delegation only twice, both in 1935. The principle still matters as a baseline: Congress can authorize an agency to fill in details, but it cannot hand over fundamental policy choices that the Constitution assigns to elected legislators.
The Three Types of Federal Agencies
Federal agencies fall into three main structural categories. The differences are more than organizational — they determine how much independence an agency has from the White House.
Executive Agencies
Executive agencies sit within Cabinet departments and answer directly to the President. Their leaders serve at the President’s pleasure, meaning the President can fire them at any time for any reason, including simple policy disagreements.3Justia. The Removal Power The Occupational Safety and Health Administration inside the Department of Labor and the Federal Aviation Administration inside the Department of Transportation are typical examples. Because their heads can be replaced at will, these agencies tend to track the current administration’s priorities closely.
Independent Regulatory Agencies
Independent regulatory agencies operate with some insulation from presidential control. They are typically run by a multi-member board or commission whose members the President appoints and the Senate confirms, but the President can remove them only for cause, meaning inefficiency, neglect of duty, or misconduct in office, not disagreement over policy.4Justia. Humphreys Executor v United States, 295 US 602 (1935) The Securities and Exchange Commission, the Federal Communications Commission, and the Federal Trade Commission all follow this model. The idea is that certain functions, particularly market oversight and adjudication, benefit from stability that survives a change in administration.
Government Corporations
Government corporations operate more like a business than a traditional regulatory body. The United States Postal Service and the Federal Deposit Insurance Corporation are the best-known examples. These entities generate revenue through fees or services rather than relying entirely on congressional appropriations. They still fall under the executive branch and are subject to federal law, but their day-to-day operations look quite different from those of a standard regulatory agency.
What Federal Agencies Do
Most federal agencies combine three types of power that are carefully separated among the branches elsewhere in the federal government. This concentration is what makes agencies powerful and, to their critics, troubling.
Writing Rules
Agencies write regulations that carry the force of law, filling in technical details that broad congressional statutes leave open. Congress might direct an agency to ensure “safe” drinking water; the agency defines which chemicals are allowed at which concentrations. Proposed regulations first appear in the Federal Register, a daily publication of government notices. Once finalized, they are codified in the Code of Federal Regulations (CFR), an annually updated collection organized across 50 titles. The Federal Register is the running diary of regulatory activity; the CFR is the permanent reference book.
Enforcing Rules
Agencies investigate potential violations of the regulations they write. Their enforcement authority includes the power to conduct inspections, demand documents, and compel testimony through administrative subpoenas.5U.S. Department of Justice. Report to Congress on the Use of Administrative Subpoena Authorities When an agency finds a violation, it can initiate actions ranging from warning letters to formal proceedings seeking penalties. Without active enforcement, regulations would amount to suggestions, and regulated industries know the difference.
Resolving Disputes
Agencies also resolve disputes through internal hearings run by Administrative Law Judges (ALJs). An ALJ hears evidence, evaluates testimony, and issues a written decision based on the record.6eCFR. 20 CFR Part 404 Subpart J – Administrative Law Judge Hearing Procedures Penalties can include fines, license revocations, and cease-and-desist orders. ALJs themselves have statutory protections: an agency can only remove, suspend, or demote an ALJ for good cause determined by the Merit Systems Protection Board after a hearing.7Office of the Law Revision Counsel. 5 USC 7521 – Actions Against Administrative Law Judges That protection exists to keep ALJs from being pressured to rule the way agency leadership wants.
This adjudication power took a hit in 2024, when the Supreme Court ruled in SEC v. Jarkesy that defendants facing civil penalties for securities fraud are entitled to a jury trial in federal court under the Seventh Amendment.8Supreme Court of the United States. SEC v Jarkesy, No 22-859 (2024) The Court found that because the SEC’s fraud claims and the civil penalties it sought resemble common-law actions for money damages, the agency could not bypass the jury right by routing those cases through its own in-house process. The full ripple effects are still working through the lower courts, but the decision clearly limits when agencies can use internal tribunals to impose penalties.
The Administrative Procedure Act
The Administrative Procedure Act (APA), enacted in 1946, is the master set of rules governing how federal agencies make and enforce regulations. Two of its provisions matter most in practice.
Notice-and-Comment Rulemaking
Before an agency can finalize a new regulation, it generally must publish a notice of the proposed rule in the Federal Register, including the legal authority behind it and either the text of the rule or a description of the issues involved.9Office of the Law Revision Counsel. 5 USC 553 – Rule Making The agency opens a public comment period, during which anyone — individuals, businesses, advocacy groups — can submit written arguments or data. After reviewing those comments, the agency must publish a statement explaining the basis and purpose of the final rule. Comments that identify overlooked data or unintended consequences do change final rules.
Certain categories are exempt: interpretive rules that clarify existing regulations, general policy statements, and rules governing internal agency procedures. An agency can also skip the process when it finds good cause that notice would be impractical or contrary to the public interest, though it must explain that reasoning in the final rule.9Office of the Law Revision Counsel. 5 USC 553 – Rule Making
Judicial Review Under Section 706
When someone challenges an agency action in court, the APA tells the judge what to look for. Under 5 U.S.C. § 706, a reviewing court must set aside any agency action it finds to be “arbitrary, capricious, an abuse of discretion, or otherwise not in accordance with law.”10Office of the Law Revision Counsel. 5 USC 706 – Scope of Review In plain terms, the agency has to show that it looked at the relevant data, considered the important issues, and reached a conclusion that makes logical sense. A court will not substitute its own policy judgment for the agency’s, but if the agency ignored a critical factor or offered an explanation that contradicts its own evidence, the rule gets thrown out.
The same section authorizes courts to strike down agency actions that exceed statutory authority, violate constitutional rights, or fail to follow required procedures.11Administrative Conference of the United States. Judicial Review of Agency Action When a court sets aside an agency action, it vacates the rule entirely. The action loses all legal effect and the agency can no longer enforce it against anyone.
Who Holds Agencies Accountable
No agency operates without accountability. All three constitutional branches exert control, through very different levers.
The President
The President shapes agency behavior primarily through appointments, selecting the officials who lead each organization. Beyond personnel, Executive Order 12866 requires agencies to submit significant regulatory actions to the Office of Information and Regulatory Affairs (OIRA) within the Office of Management and Budget for review before publication.12US EPA. Summary of Executive Order 12866 – Regulatory Planning and Review OIRA evaluates whether the benefits of a proposed regulation justify its costs and whether it aligns with presidential priorities. That review gives the White House a chokepoint over major regulatory changes before they reach the public.
Congress
Congress controls agency funding through the appropriations process. Article I provides that no money can be drawn from the Treasury except through appropriations made by law, and this power of the purse is the most direct check Congress holds.13National Constitution Center. Article I, Section 9 – Powers Denied Congress By increasing or cutting an agency’s budget, Congress can expand or effectively cripple specific programs without changing a single regulation.
Congress also uses hearings, investigations, and the Congressional Review Act (CRA). The CRA gives Congress a fast-track procedure to overturn agency rules: within 60 session days of receiving a new rule, either chamber can introduce a joint resolution of disapproval. In the Senate, these resolutions are immune from filibuster and subject to only 10 hours of debate, so they can pass by simple majority.14Administrative Conference of the United States. Congressional Review Act Basics If a disapproval resolution passes both chambers and the President signs it, or Congress overrides a veto, the rule is void, and the agency is barred from issuing a substantially similar rule unless Congress later authorizes it.
The Courts
Anyone affected by an agency action can challenge it in federal court, though most courts require you to exhaust the agency’s internal appeals process first. The APA generally allows you to go straight to court once you have a final agency decision, but if the agency’s own regulations require internal appeal and hold the action during that appeal, you typically need to complete that step before a judge will hear your case.15U.S. Department of Justice. Exhaustion of Administrative Remedies Courts then apply the standards from 5 U.S.C. § 706: arbitrary and capricious for factual and policy decisions, and de novo review for pure legal questions.10Office of the Law Revision Counsel. 5 USC 706 – Scope of Review
Inspectors General
Federal law places an Office of Inspector General inside most major agencies, including the Departments of Defense, Justice, and Homeland Security, and agencies like the EPA and NASA.16Office of the Law Revision Counsel. 5 USC Ch 4 – Inspectors General Each Inspector General is charged with detecting and preventing fraud, waste, and abuse within the agency. They conduct independent audits and investigations, report findings to both the agency head and Congress, and maintain channels for employees to file whistleblower complaints. The statutory framework is designed to keep Inspectors General independent from the officials they oversee, though the practical strength of that independence depends on how aggressively the protections are enforced.
Recent Supreme Court Limits on Agency Power
The legal ground beneath federal agencies has shifted in the last few years. Three Supreme Court decisions, all within a two-year window, have redrawn the boundaries of agency authority.
Chevron Deference Is Gone
For 40 years, the Chevron doctrine told courts to defer to an agency’s reasonable interpretation of an ambiguous statute. If Congress left a gap or used vague language, and the agency filled it with a plausible reading, courts had to accept that reading even if the judge would have interpreted the statute differently. In June 2024, the Supreme Court overruled Chevron in Loper Bright Enterprises v. Raimondo, holding that the APA requires courts to “exercise their independent judgment in deciding whether an agency has acted within its statutory authority.”17Supreme Court of the United States. Loper Bright Enterprises v Raimondo, No 22-451 (2024)
Courts may still give respectful consideration to an agency’s interpretation, especially where the agency has relevant expertise, but they are no longer required to accept it. Judges apply the traditional tools of statutory interpretation and reach their own conclusion about what the law means. The shift gives regulated parties a stronger hand when challenging agency rules and makes the precise wording of the enabling statute far more important than it was under Chevron.
The Major Questions Doctrine
Even before Chevron fell, the Supreme Court had been tightening limits on agency authority through the major questions doctrine. In West Virginia v. EPA (2022), the Court held that when an agency claims power to make decisions of “vast economic and political significance,” it must point to “clear congressional authorization” in the statute; a vague or broadly worded provision is not enough.18Supreme Court of the United States. West Virginia v EPA, No 20-1530 (2022) The Court struck down EPA regulations that would have forced a nationwide shift away from coal-fired power generation, finding that “a decision of such magnitude and consequence rests with Congress itself, or an agency acting pursuant to a clear delegation from that representative body.” The bigger the economic stakes of a proposed regulation, the more specific Congress needs to have been in granting the authority.
Jury Trial Rights in Agency Enforcement
The third shift came in SEC v. Jarkesy. By requiring jury trials when agencies seek civil penalties for claims resembling common-law fraud, the Court closed off one of the most powerful tools agencies had used for decades: routing enforcement cases through their own internal tribunals where no jury sits and the agency’s own judges find the facts.8Supreme Court of the United States. SEC v Jarkesy, No 22-859 (2024) How far this principle extends beyond securities fraud is still being litigated, but any agency that imposes civil penalties through administrative proceedings should expect challenges.
How the Public Participates
Federal agencies are not black boxes. Two legal mechanisms let the public see what agencies are doing and weigh in before rules take effect.
Commenting on Proposed Rules
The primary portal for public participation is Regulations.gov, where you can search open rulemaking dockets, read proposed rules, and submit comments electronically.19Regulations.gov. Regulations.gov The site displays comment deadlines and lets you track the status of dockets across agencies. Comments do not need to come from lawyers or industry experts. Anyone can participate, and agencies are legally required to consider the substantive points raised during the comment period before finalizing a rule. A well-documented comment explaining how a proposed regulation would affect your business or community can carry real weight, particularly when it includes data the agency overlooked.
Requesting Records Under FOIA
The Freedom of Information Act (FOIA) gives any person the right to request records from federal agencies. An agency generally must determine whether to comply with a request within 20 business days of receiving it.20Office of the Law Revision Counsel. 5 USC 552 – Public Information; Agency Rules, Opinions, Orders, Records, and Proceedings That deadline can be tolled if the agency needs to request clarification or resolve fee issues, and complex requests involving large volumes of records routinely take longer. If the agency denies your request, you have at least 90 days to file an internal appeal, and after that you can challenge the denial in federal court. FOIA requests are free to file, though the agency may charge fees for search time and document duplication depending on volume.