We have now officially entered the period when the Biden administration is up against the clock if it wishes to codify regulatory changes and get them on the books before President-elect Trump assumes office on January 20, 2025. President-elect Trump is expected to immediately freeze any final rule that has not yet taken effect by Inauguration Day, leaving little time for the Biden administration to act.
In this post, we explore how this regulatory landscape will likely play out in the coming weeks in an effort to plan for which rules are likely to stick around and which will likely be revisited by the new administration.

With few exceptions, federal law requires the effective date of final rules to be delayed by at least 30 days after publication; for major or significant rules, the delay is at least 60 days[1]. By "publish," we mean officially published in the Federal Register; a rule is not official while still under review by the Office of Management and Budget (OMB), filed for public inspection, or at any other pre-publication stage.
As the clock ticks down, agencies may attempt to bypass these standard timeframes by expediting effective dates. This requires a “good cause” exception — such as a claim that it is necessary for national security, public health, or safety — but using this route can invite legal challenges. Predicting which agencies may try this approach or for which rules is speculative, so we focus on how the standard process is likely to play out to allow for rational planning in these final weeks.
Below are key timelines and scenarios to consider under the assumption that rules will follow the standard process envisioned by law without being expedited.
Key Assumptions and Timelines
Final Date for Major or Significant Rules
Deadline: Monday, November 18, 2024
Major or significant rules published on or before this date will take effect before Inauguration Day and escape President-elect Trump’s regulatory freeze. Reversing these rules would likely require formal rulemaking, subject to a public comment period, or Congressional disapproval via the Congressional Review Act (CRA), which we discuss below.
Final Date for Standard Rules with a 30-Day Delay
Deadline: Wednesday, December 18, 2024
Standard rules published by this date will also take effect before Inauguration Day and similarly avoid the freeze. Reversing these rules would require formal rulemaking or Congressional disapproval under the CRA.
Rules Published After These Deadlines
Rules published after these dates will not take effect before January 20, 2025, and are highly likely to be paused or withdrawn by the incoming administration. Such rules may be subject to:
Modification or rewriting, which could take weeks or months.
Republication as originally written.
Withdrawal, with or without public explanation.
Rules Still Pending OMB Approval on Inauguration Day
Any rule awaiting OMB approval as of January 20, 2025, will likely be withdrawn and reconsidered, creating uncertainty for several weeks or months as the Trump administration reviews its options.

Rules Pending Approval by the Office of Management and Budget (OMB)
As of November 18, 2024, there are 154 regulatory actions pending OMB approval[2]. Of these, 82 are final rules and 72 are proposed rules. Notably, 26 are significant final rules, meaning they should be subject to the 60-day delay in effective date required by law. There are also several rules previously approved by OMB in recent weeks which have not yet been published. Unless the Biden administration chooses to expedite these rules using a “good cause” exception to standard timeframes, they have no realistic chance of taking effect before Inauguration Day.
These significant rules cover critical policy priorities, including energy conservation, environmental standards, public health and safety, student debt relief, and labor-related issues. Whether the administration attempts to expedite these rules to cement its regulatory legacy remains to be seen, but their importance underscores the challenges and high stakes of this final stretch before January 20, 2025.
The CRA
The CRA provides a powerful tool for Congress to disapprove of rules finalized in the last 60 legislative days. The exact cutoff date will be determined by Congress in January 2025, but it is estimated to include final rules published on or after approximately August 1, 2024[3].
Disapproval under the CRA only requires a simple majority in both chambers of Congress and the president's signature. Republicans control the White House and both chambers of Congress, so this rarely used option is more viable than ever this year. President-elect Trump used the CRA in 2017 to repeal nearly 20 Obama-era rules.
Importantly, CRA disapproval removes the rule immediately and as though it never took effect. It also prevents future administrations from issuing a similar rule unless Congress explicitly authorizes it.
Post-Chevron Era in the Courts
One critical new consideration this time around is the Supreme Court’s June 2024 decision eliminating Chevron deference, which had long required courts to defer to agency interpretations of ambiguous statutes. Post-Chevron, agencies face heightened judicial scrutiny: courts will independently evaluate whether an agency's rule aligns with the statutory framework, rather than deferring to the agency’s expertise.
For the Biden administration, this means hastily written rules issued to beat the clock could be especially vulnerable. Agencies must ensure their rules are thoughtfully crafted, backed by thorough records, and procedurally sound. Gaps in justification or statutory authority, which might previously have been overlooked under Chevron, will now be magnified, making rules more susceptible to judicial invalidation. This raises the stakes for finalizing rules in these final weeks.

Bottom Line
The ease with which President-elect Trump and his team can undo a particular rule issued under the Biden administration depends on the following:
Rules already codified and effective before Inauguration Day generally require a formal new proposed rule and comment period. One exception: Congress can pass a resolution of disapproval on final rules adopted since approximately August 1, 2024, and wipe out the rule immediately upon being signed into law.
Rules published but not yet effective as of Inauguration Day can be paused for further review and ultimately be allowed to take effect as originally published, modified with a new proposed rule, or withdrawn.
Rules which have not yet been published can simply be paused or withdrawn, unless required by law or a court order.
Practical Implications for Stakeholders
As Inauguration Day approaches, businesses and stakeholders should keep the following in mind:
Monitor Effective Dates: Pay close attention to effective dates on rules published between now and Inauguration Day to anticipate their likely treatment by the new administration.
Participate in Open Comment Periods: For proposed rules still open for comment, direct your input toward the priorities of the incoming administration, as it will ultimately decide whether and how to finalize these rules.
Expect Delays: Be prepared for pauses in implementation as the Trump administration reviews and reconsiders pending and recently finalized rules. There may be extended periods of time with little to no new information on the fate of a particular rule.
Ensure Compliance: Final rules that take effect before Inauguration Day remain binding law unless formally rescinded or modified. Continue compliance unless and until the issuing agency provides new guidance.
Let Iota Intel Help You Navigate the Transition
The next several weeks represent a critical period for businesses, industries, and stakeholders impacted by federal regulations. The stakes are high, with significant uncertainty surrounding which rules will survive, be modified, or face repeal. Navigating this regulatory landscape requires a strategic approach, whether you’re preparing for compliance, drafting comment letters, or anticipating changes under the new administration.
At Iota Intel, we specialize in helping stakeholders understand and respond to shifting regulatory requirements. From crafting thoughtful, impactful comment letters to tracking developments and providing expert guidance, our team is here to support you through this transition. Don’t leave your compliance or advocacy strategy to chance — reach out to us today to ensure you’re ready for what’s next.
Now more than ever you have a great opportunity to shape the future regulatory compliance landscape, and Iota Intel is here to help you engage in this process.
Conclusion
As the Biden administration races to finalize its regulatory priorities and President-elect Trump prepares to reshape the federal regulatory agenda, the landscape for stakeholders is rapidly evolving. Whether you're seeking to influence new rules, prepare for compliance, or mitigate risks, now is the time to act. The rules issued in the coming weeks will shape the policy landscape for years to come—make sure your voice is heard, and your business is ready.
Endnotes
[1] A “Major rule” generally is expected to result in (1) an annual effect on the economy of $100 million or more; (2) a major increase in costs or prices for consumers, individual industries, federal, state, or local government agencies, or geographic regions; or (3) significant adverse effects on competition, employment, investment, productivity, or innovation, or on the ability of United States-based enterprises to compete with foreign-based enterprises in domestic and export markets. 5 USC § 804(2) - from U.S. Government Accountability Office. Note, the Office of Management and Budget (OMB) recently updated its own definition of “significant” to rules with a $200 million impact on the economy.
[2] Executive Order Submissions Under Review, as of November 18, 2024.