DOT Issues Final Rule Amending the Oral Fluid Rule and Updating Terminology: What You Need to Know
- willrothconsulting
- 6 days ago
- 3 min read
Effective Date: 10 June 2026
On 11 May 2026, the U.S. Department of Transportation (DOT) published a Final Rule in the Federal Register making two significant changes to its drug and alcohol testing regulations under 49 CFR Part 40. This rule is effective 10 June 2026, and it affects every DOT-regulated employer, Designated Employer Representative (DER), and safety-sensitive employee across all six DOT operating administrations — FAA, FMCSA, FRA, FTA, PHMSA, and USCG.
Here is what you need to know.
What This Final Rule Does
1. Terminology Update Consistent with Executive Order 14168
The first change updates the language used throughout DOT's drug and alcohol testing regulations to be consistent with Executive Order 14168, Defending Women from Gender Ideology Extremism and Restoring Biological Truth to the Federal Government. This executive order directs federal agencies to use terminology that reflects biological sex rather than gender identity in federal regulations, forms, and official communications.
As a result, you will see updated language reflected in Part 40 and the agency-specific regulations. While this change does not alter the substance of the testing requirements themselves, it does represent a regulatory revision that employers, service agents, and other program participants should be aware of, particularly as updated forms and guidance documents are issued.
2. Directly Observed Urine Collection When Oral Fluid Testing Is Unavailable
The second change is operationally significant. Under the original Oral Fluid Rule (effective 1 June 2023), certain testing situations, specifically return-to-duty and follow-up testing require the use of oral fluid collection. However, oral fluid testing under the DOT program cannot be implemented until the U.S. Department of Health and Human Services (HHS) certifies at least two laboratories for oral fluid testing. That certification has not yet occurred.
This created a gap: the regulation mandated oral fluid in specific circumstances, but oral fluid testing was not yet available to use.
This Final Rule closes that gap. It adds a provision requiring that a directly observed urine collection be conducted in any situation where oral fluid testing is currently required but oral fluid testing is not yet available. In practical terms, this means:
When oral fluid testing is required under the current regulations but cannot be performed because HHS-certified oral fluid laboratories are not yet operational, the collection must proceed as a directly observed urine test.
This is not optional. The rule mandates direct observation in these circumstances.
This provision remains in effect until oral fluid testing becomes available through HHS laboratory certification.
Why This Matters for SAPs and Employers
As a qualified Substance Abuse Professional (SAP), I work with employees across all six DOT operating administrations who have violated DOT drug and alcohol testing regulations. Return-to-duty (RTD) and follow-up testing are central to the SAP process, and this rule directly affects how those tests must be conducted.
For employers and DERs: Make sure your collections are being conducted under direct observation for RTD and follow-up tests when oral fluid is indicated but unavailable. This is not just a best practice; it is now a regulatory requirement. If your collectors or C/TPAs are not aware of this change, they need to be.
For employees in the RTD process: Direct observation means a same-gender observer will be present to watch you provide your urine specimen. This may feel uncomfortable, but it is required by federal regulation. It is not a punitive measure specific to your case; it is the required procedure.
For collectors and C/TPAs: Update your procedures to reflect this requirement before 10 June 2026. If you are scheduling collections that fall under the oral fluid requirement and oral fluid is not available, a directly observed urine collection is mandatory.
What Has NOT Changed
This Final Rule does not change:
The drugs tested for under DOT's five-panel (with expanded opioids) drug testing program
The threshold levels for positive results
The SAP evaluation and RTD process requirements under Subpart O of Part 40
Random testing rates for 2026
The underlying framework of the Oral Fluid Rule is oral fluid testing remains part of DOT's program and will be implemented once HHS certifies laboratories
Effective Date and Where to Learn More
This Final Rule is effective 10 June 2026. All covered employers, service agents, and program participants should review the rule and update their procedures accordingly before that date.
To read the full text of this Final Rule, visit the DOT Office of Drug and Alcohol Policy and Compliance (ODAPC) Federal Register publications page:
Questions? ASK A SAP!®
If you have questions pertaining to DOT Alcohol & Drug Testing Regulation, the Role of an SAP or the Return-To-Duty process, ASK A SAP!®
Willroth Consulting serves employers, employees, and DERs across all six DOT operating administrations: FAA, FMCSA, FRA, FTA, PHMSA, and USCG.
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