Part 389 — Rulemaking Procedures
49 CFR Part 389: How FMCSA proposes, reviews, and finalizes new trucking regulations.
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49 CFR Part 389 establishes the rulemaking procedures FMCSA follows when proposing, reviewing, and finalizing changes to the Federal Motor Carrier Safety Regulations. These procedures ensure that new trucking rules go through a public process before taking effect, giving carriers, drivers, and industry groups the opportunity to comment and influence outcomes.
The standard process under Part 389 follows the Administrative Procedure Act (APA): FMCSA publishes a Notice of Proposed Rulemaking (NPRM) in the Federal Register, opens a public comment period (typically 30-90 days), reviews the submitted comments, and then publishes a Final Rule with an effective date. The agency must respond to significant comments and explain its regulatory choices in the preamble to the final rule.
Part 389 also provides for emergency rulemaking — interim final rules that take effect immediately when FMCSA determines that public safety requires urgent action. Emergency rules are still subject to subsequent public comment, but they can impose new compliance requirements without the normal advance notice. The 2026 ELD revocation out-of-service order rule was processed through an expedited procedure.
Key Provisions
- FMCSA follows the Administrative Procedure Act notice-and-comment process for new regulations.
- NPRMs are published in the Federal Register with public comment periods of 30-90 days.
- Carriers, drivers, and industry groups can submit formal comments on proposed rules.
- FMCSA must respond to significant comments in the final rule preamble.
- Emergency rulemaking procedures allow immediate action when public safety requires urgent response.
Why It Matters to Truck Owners
Understanding the rulemaking process under Part 389 means understanding that trucking regulation is not handed down without opportunity for input. Industry associations like ATA, OOIDA, and others actively participate in FMCSA rulemaking to shape outcomes. Individual carriers and drivers can also submit comments on proposed rules. If a proposed rule would significantly affect your operation, engaging in the comment process is your legitimate channel for influence.
Frequently Asked Questions
How can carriers participate in FMCSA rulemaking?
During the public comment period on any NPRM published in the Federal Register, any person can submit comments through regulations.gov. Comments should be specific and data-supported — FMCSA is more likely to respond to comments that identify concrete problems with a proposed rule and provide evidence-based alternatives.
How long does FMCSA rulemaking typically take?
The full rulemaking cycle — from NPRM to final rule — typically takes 1-5 years for major rules. The ELD mandate took several years from the initial NPRM to full enforcement. Emergency or interim final rules can take effect immediately, though they remain subject to subsequent public comment.
What is an Advance Notice of Proposed Rulemaking (ANPRM)?
Before publishing an NPRM, FMCSA sometimes publishes an ANPRM to gather information about a regulatory issue and explore possible approaches. ANPRMs are an earlier stage of the process where FMCSA is still formulating its approach — they represent an even earlier opportunity for industry input than the formal NPRM.
Read the official legal text: 49 CFR Part 389 — eCFR.gov (official)
Related Federal Trucking Laws
- Part 381 — Waivers, Exemptions, and Pilot Programs
- Part 385 — Safety Fitness Procedures
- Motor Carrier Safety Improvement Act of 1999
This page is provided for informational purposes only and is not legal advice. Always verify current requirements at fmcsa.dot.gov or with a qualified transportation attorney.
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