A law becomes a regulation when Congress passes a statute that delegates authority to a federal agency, and that agency then writes, proposes, and finalizes the detailed rules that put the statute into practice. Congress sets the policy; the agency fills in the operational specifics through a process governed by the Administrative Procedure Act. The core steps are a published proposal, a public comment period, a final rule with the agency’s reasoning, and codification in the Code of Federal Regulations. Depending on the rule’s complexity and how many comments come in, the whole cycle can take months or years.
It Starts With an Enabling Statute
Agencies cannot regulate on their own initiative. Their authority comes from a specific law, often called an enabling statute, that identifies a problem, sets goals, and hands the details to a named agency. Congress might require cleaner air but leave the Environmental Protection Agency to set the exact pollutant limits.
The statute defines what the agency can regulate. A rule that goes beyond that grant of authority can be struck down in court, which is why the scope of the delegation matters so much when regulations are later challenged.
Early Signals Before a Proposal
The public can see rules coming before any formal proposal is written. Since 1978, federal agencies have been required by executive order to publish their planned regulatory actions in the Unified Agenda of Regulatory and Deregulatory Actions, released by the Office of Information and Regulatory Affairs. The Unified Agenda covers near-term and long-term planned actions.1RegInfo.gov. Unified Agenda of Regulatory and Deregulatory Actions
For complex or novel issues, an agency may also publish an Advance Notice of Proposed Rulemaking. It describes the problem and asks for input before any regulatory text exists. An Advance Notice is not required by the APA and does not replace the formal proposal that must come later, but it lets the public shape a rule at the earliest stage.
The Notice of Proposed Rulemaking
Once the agency has drafted a proposal, it publishes a Notice of Proposed Rulemaking in the Federal Register, the government’s official daily journal. The APA requires the notice to state the legal authority for the rule, the substance of what is being proposed, and how the public can participate.2Office of the Law Revision Counsel. 5 USC 553 – Rule Making The agency also explains the problem it is trying to solve and its reasoning.
Publication marks the formal start of the public phase. Anyone can read the full proposal on the Federal Register’s website or through Regulations.gov, the central portal for federal regulatory actions.3Regulations.gov. Learn About the Regulatory Process
The Public Comment Period
Once the proposal is published, a comment period opens. Anyone can weigh in: individuals, businesses, nonprofits, state governments, trade associations, scientific organizations. The APA guarantees the right to participate but does not set a minimum number of days. Agencies typically allow at least 30 days, and complex or economically significant rules often get 60 days or more.2Office of the Law Revision Counsel. 5 USC 553 – Rule Making
Most comments are submitted through Regulations.gov, where you can search by docket number or title. Some agencies also accept comments by mail.3Regulations.gov. Learn About the Regulatory Process Comments submitted through the portal become part of the public record.
What Makes a Comment Actually Count
A one-line statement of support or opposition gives the agency nothing to work with. Agencies must consider substantive comments, so the ones that move the needle explain how the rule would affect a specific situation, identify data the agency may have missed, or propose a concrete alternative. If the agency relied on flawed or outdated information, pointing that out with citations to better data is exactly the kind of feedback that produces changes in the final rule.
Structure helps. Identify the specific section you are addressing, explain your concern, and offer a recommendation. If you have relevant expertise or direct experience, say so up front.
Executive Branch Review
Significant rules go through another layer before publication. The Office of Information and Regulatory Affairs, part of the Office of Management and Budget, reviews draft proposed and final rules. This review is governed by Executive Order 12866, as amended by Executive Order 14094 in 2023.
A regulatory action is “significant” if it is likely to have an annual economic effect of $200 million or more, create inconsistencies with other agencies’ actions, alter the budgetary impact of federal programs, or raise novel legal or policy issues.4National Archives. Modernizing Regulatory Review For rules meeting the threshold, OIRA has up to 90 days to complete its review. Major regulations therefore pass through OIRA twice: once at the proposed stage and again before the final rule is published. The review is where cost-benefit analysis and White House policy priorities can shape the details, and it is sometimes a source of significant delay.
Finalizing the Rule
After the comment period closes, agency staff read every substantive comment, weigh the arguments and data, and decide whether the proposal needs to change. The agency might narrow the scope of the rule, adjust a compliance deadline, change a numerical threshold, or add an exemption for small businesses.
The agency then drafts a final rule with two parts: the regulatory text itself and a preamble. The preamble is often longer than the rule. In it, the agency must explain its reasoning, respond to the significant issues raised in comments, and justify its decisions. If it changed course based on public feedback, it says why. If it rejected a widely raised objection, it must explain that too.2Office of the Law Revision Counsel. 5 USC 553 – Rule Making That written record is what courts later review.
The agency can also withdraw the proposal entirely if comments show that the rule is unworkable or that the underlying problem does not justify regulation. Withdrawal is uncommon but does happen.
Publication, Effective Date, and Codification
The final rule is published in the Federal Register. The APA requires that a substantive rule be published at least 30 days before it takes effect, giving affected parties time to prepare.2Office of the Law Revision Counsel. 5 USC 553 – Rule Making There are narrow exceptions: rules that grant an exemption or relieve a restriction can take effect sooner, and an agency can shorten the wait for good cause.
Major rules under the Congressional Review Act wait longer. A major rule is one likely to have an annual economic impact of $100 million or more, cause a major increase in costs for consumers or industries, or significantly harm competition or employment.5Office of the Law Revision Counsel. 5 USC 804 – Definitions These cannot take effect until at least 60 days after Congress receives the agency’s report or the rule is published in the Federal Register, whichever is later.6Office of the Law Revision Counsel. 5 USC 801 – Congressional Review
Once the effective date arrives, the regulation is codified in the Code of Federal Regulations, the official compilation of permanent federal regulations organized by subject.7GovInfo. Code of Federal Regulations At that point it carries the full force of law, and individuals and businesses must comply or face enforcement.
Congressional Review of the Finished Rule
The Congressional Review Act gives Congress a check on rulemaking. Before any rule takes effect, the agency must submit a report to both chambers of Congress and the Government Accountability Office. Congress then has 60 legislative days to review the rule and, if it chooses, pass a joint resolution of disapproval.8U.S. Government Accountability Office. FAQs on the Congressional Review Act
If a joint resolution is signed by the President, or Congress overrides a veto, the rule is treated as though it never took effect. The agency is also barred from reissuing a substantially similar rule unless Congress specifically authorizes it in a later law.6Office of the Law Revision Counsel. 5 USC 801 – Congressional Review The tool is powerful but requires political alignment between both chambers and the White House, and it has been used most often in the early months of a new administration to roll back regulations finalized late in the prior one.
Rules That Skip Notice and Comment
Not every rule follows the full process. The APA carves out several categories that agencies can issue without a proposal or public comment period:
- Interpretive rules that explain how the agency understands an existing statute or regulation without creating new legal obligations.
- General statements of policy describing how the agency intends to exercise its discretion, which are not legally binding on the public.
- Procedural rules governing internal agency organization and practices.
- Rules where the agency finds good cause that notice and comment would be impracticable, unnecessary, or contrary to the public interest, with the reasoning stated in the rule itself.2Office of the Law Revision Counsel. 5 USC 553 – Rule Making
- Rules involving military or foreign affairs functions.
The line between a binding rule and an interpretive rule or policy statement is one of the most litigated questions in administrative law, because agencies sometimes issue what look like new obligations under the label of guidance.
Challenging a Regulation in Court
Once a regulation is final, anyone adversely affected by it can challenge it in federal court. The APA authorizes courts to strike down agency actions that are arbitrary, capricious, an abuse of discretion, in excess of the agency’s statutory authority, or adopted without following required procedures.9Office of the Law Revision Counsel. 5 USC 706 – Scope of Review
In 2024, the Supreme Court overruled Chevron deference in Loper Bright Enterprises v. Raimondo. For 40 years under Chevron, courts had deferred to an agency’s reasonable interpretation of an ambiguous statute. The Court held that the APA requires courts to exercise their own independent judgment when interpreting statutes, rather than deferring to the agency’s reading simply because the law is unclear.10Supreme Court of the United States. Loper Bright Enterprises v. Raimondo Courts can still consider an agency’s interpretation as informative, but they are no longer required to accept it.
In the months after the decision, lower courts invalidated new agency rules at a markedly higher rate than before. The reasoning in a rule’s preamble and the strength of its statutory authority now carry more weight in court than they used to.
Petitioning for a New Rule
Rulemaking does not always start with Congress or the agency. The APA gives any interested person the right to petition a federal agency to issue, amend, or repeal a rule.11Office of the Law Revision Counsel. 5 USC 553 – Rule Making You do not need to be a lawyer or represent an organization. If you think an existing regulation is outdated or that a new one is needed to address a problem the agency already has authority over, you can file a formal petition.
Agencies must consider petitions but are not required to grant them. A denial has to be accompanied by an reasoning, and the petitioner can challenge that denial in court if the explanation is inadequate. Some environmental and safety statutes go further and set specific petition procedures with deadlines for agency response.12US EPA. Administrative Petitions for Rulemaking It is one of the least-used tools available to the public for influencing federal regulation.