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What changed

Every point at which a section's wording changed, was added or was removed. Day-precise from 2017 (eCFR); before that, changes surface at the annual edition that first printed them (revised as of October 1). Current through Oct. 15, 2026.

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One email when a section of the FMCSRs is amended, added or removed, with the redline. The rules move about fifteen times a year, in clusters. No weekly filler.

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54 changes in 2008
Changes in 2008 are dated 2008-10-01, the annual edition that first printed them. The actual effective dates fall in the twelve months before that; the bracketed Federal Register citations on each section give the precise dates.

October 1, 200854 sections

  • amended§ 40.3What do the terms used in this regulation mean?Part 40
  • amended§ 40.7How can you get an exemption from a requirement in this regulation?Part 40
  • amended§ 40.23What actions do employers take after receiving verified test results?Part 40
  • amended§ 40.33What training requirements must a collector meet?Part 40
  • amended§ 40.67When and how is a directly observed collection conducted?Part 40
  • amended§ 40.83How do laboratories process incoming specimens?Part 40
  • amended§ 40.89What is validity testing, and are laboratories required to conduct it?Part 40
  • amended§ 40.95What are the adulterant cutoff concentrations for initial and confirmation tests?Part 40
  • added§ 40.96What criteria do laboratories use to establish that a specimen is invalid?Part 40
  • amended§ 40.97What do laboratories report and how do they report it?Part 40
  • amended§ 40.103What are the requirements for submitting blind specimens to a laboratory?Part 40
  • amended§ 40.105What happens if the laboratory reports a result different from that expected for a blind specimen?Part 40
  • amended§ 40.111When and how must a laboratory disclose statistical summaries and other information it maintains?Part 40
  • amended§ 40.121Who is qualified to act as an MRO?Part 40
  • amended§ 40.129What are the MRO's functions in reviewing laboratory confirmed non-negative drug test results?Part 40
  • amended§ 40.131How does the MRO or DER notify an employee of the verification process after receiving laboratory confirmed non-negative drug test results?Part 40
  • amended§ 40.133Without interviewing the employee, under what circumstances may the MRO verify a test result as positive, or as a refusal to test because of adulteration or substitution, or as cancelled because the test was invalid?Part 40
  • amended§ 40.149May the MRO change a verified drug test result?Part 40
  • amended§ 40.155What does the MRO do when a negative or positive test result is also dilute?Part 40
  • amended§ 40.159What does the MRO do when a drug test result is invalid?Part 40
  • added§ 40.160What does the MRO do when a valid test result cannot be produced and a negative result is required?Part 40
  • added§ 40.162What must MROs do with multiple verified results for the same testing event?Part 40
  • amended§ 40.171How does an employee request a test of a split specimen?Part 40
  • amended§ 40.177What does the second laboratory do with the split specimen when it is tested to reconfirm the presence of a drug or drug metabolite?Part 40
  • amended§ 40.179What does the second laboratory do with the split specimen when it is tested to reconfirm an adulterated test result?Part 40
  • amended§ 40.181What does the second laboratory do with the split specimen when it is tested to reconfirm a substituted test result?Part 40
  • amended§ 40.183What information do laboratories report to MROs regarding split specimen results?Part 40
  • amended§ 40.187What does the MRO do with split specimen laboratory results?Part 40
  • amended§ 40.191What is a refusal to take a DOT drug test, and what are the consequences?Part 40
  • amended§ 40.197What happens when an employer receives a report of a dilute specimen?Part 40
  • amended§ 40.201What problems always cause a drug test to be cancelled and may result in a requirement for another collection?Part 40
  • amended§ 40.207What is the effect of a cancelled drug test?Part 40
  • amended§ 40.213What training requirements must STTs and BATs meet?Part 40
  • amended§ 40.281Who is qualified to act as a SAP?Part 40
  • amended§ 40.331To what additional parties must employers and service agents release information?Part 40
  • amendedAppendix B to Part 40Appendix B to Part 40—DOT Drug Testing Semi-Annual Laboratory Report to EmployersPart 40
  • addedAppendix C to Part 40Appendix C to Part 40—DOT Drug Testing Semi-Annual Laboratory Report to DOTPart 40
  • amendedAppendix D to Part 40 - Report Format: Split Specimen Failure To ReconfirmAppendix D to Part 40 - Report Format: Split Specimen Failure To ReconfirmPart 40
  • amendedAppendix F to Part 40Appendix F to Part 40—Drug and Alcohol Testing Information that C/TPAs May Transmit to EmployersPart 40
  • amended§ 367.20Fees under the Unified Carrier Registration Plan and Agreement for each registration year.Part 367
  • addedAppendix A to Subpart A of Part 367Appendix A to Subpart A of Part 367—Uniform Application for Single State Registration for Motor Carriers Registered with the Secretary of TransportationPart 367
  • amended§ 381.210How do I request a waiver?Part 381
  • amended§ 383.73State procedures.Part 383
  • amended§ 384.107Matter incorporated by reference.Part 384
  • amendedAppendix B to Part 385Appendix B to Part 385—Explanation of Safety Rating ProcessPart 385
  • amended§ 386.46Depositions.Part 386
  • amended§ 386.52Appeals from interlocutory rulings.Part 386
  • amendedAppendix B to Part 386Appendix B to Part 386—Penalty Schedule; Violations and Maximum Civil PenaltiesPart 386
  • amended§ 387.311Bonds and certificates of insurance.Part 387
  • amended§ 393.95Emergency equipment on all power units.Part 393
  • amended§ 395.1Scope of rules in this part.Part 395
  • amended§ 395.3Maximum driving time for property-carrying vehicles.Part 395
  • amendedAppendix G to Subchapter B of Chapter IIIAppendix G to Subchapter B of Chapter III—Minimum Periodic Inspection StandardsPart 396
  • amended§ 397.213Waiver of preemption application.Part 397