There is a lane almost nobody writes about. Empty totes going home. The chemical came out weeks ago at somebody’s plant, the I B Cs get stacked on a trailer, and they ride back to a reconditioner who washes them, tests them and sells them again. It is unglamorous, it is steady, and it has always been a hazmat move — because an empty tote is not empty, and the regulations have never pretended otherwise.
On September third that stops being true, for a specific and quite narrow set of loads.
P H M S A published sixteen final rules on August fourth. Sixteen, in one issue, most of them subtractions. This is the one I would want somebody to hand me, and it is the one with the fewest readers: two days after publication, the Federal Register’s own counter had it at 218 page views.
Now the part that is not in the preamble.
P H M S A wrote that transport vehicles carrying these residue I B Cs “are not subject to the subpart F (placarding)” requirements. That sentence is doing far more work than it looks like it is doing, because placarding is how other rulebooks decide whether they apply to you.
Go and read 49 C F R 383.5 — the C D L rules. It defines hazardous materials, for endorsement purposes, as material “required to be placarded under subpart F of 49 C F R part 172.” Then 383.93(b)(4) requires the hazmat endorsement for drivers “used to transport hazardous materials as defined in § 383.5.”
Follow that chain. Not required to be placarded, so not hazardous materials as 383.5 defines them, so no endorsement required. Nobody at P H M S A wrote “the hazmat endorsement no longer applies.” They did not have to. They changed the fact the definition was pointing at.
A document (in paper or electronic form) must accompany the shipment of IBCs that denotes the phrase ``Residue IBC(s)'' and indicates the number of IBCs containing hazardous materials for each Class or Division of material transported;
That is the whole thing. Two words and a tally.
No chemical name. No U N number. No emergency telephone number. Here is what P H M S A says that document accomplishes, quoted exactly:
“This documentation ensures that inspectors and emergency responders can quickly identify the type and quantity of hazardous materials present, thereby enabling verification of applicable segregation requirements without imposing the full shipping paper requirements of part 172.” — I have read that sentence next to the document it describes several times. “Residue I B C(s)” and a count per hazard class is a quantity and a class. It is not a type. A responder can still learn what the material is; the markings and labels stay on the drums themselves under 173.29(d)(5). The identification moved from the outside of the trailer to the side of the container.
Somebody said all of this out loud during the comment period, and it was not an advocacy group.
It was C V S A — the Commercial Vehicle Safety Alliance, whose members are the inspectors working your scales.
Consequently, CVSA believes that eliminating the requirement for shipping papers on the transport vehicle introduces a significant safety risk by decreasing the ability of inspectors and emergency responders to verify proper segregation of hazardous materials.
C V S A also said, along with a commenter named William Forbes, that the quantity limits “are unenforceable” and that enforcement personnel “will have no practical means to determine whether the residue quantity limits are being met.”
P H M S A’s answer, verbatim: the limits “can be effectively verified through established oversight practices such as routine inspections and documentation reviews.” The documentation being reviewed is the two-word one above.
The rule went final as proposed.
That last number is the one that keeps me from overselling this. P H M S A is not forecasting a flood. What changed is not the volume — it is that a permission which required applying for a special permit is now simply available to anyone who meets the conditions.
Twenty-eight days. That is when new 173.29(d) takes effect, and the honest sequence before then is short. Decide whether you are actually taking the exception, because the upside is real — no placards, no papers, and a driver you do not have to send for a T S A security threat assessment. Then look hard at the one duty the rule assigns, because it is not yours.
Here is my position, and you can disagree with it.
Take the exception if the lane justifies it, and rewrite the shipper agreement first. New 173.29(d)(1) says “the offeror must ensure” the 0.3 percent limit is met. The offeror. Your driver cannot weigh residue in a sealed tote, and by C V S A’s own account an inspector cannot check it either. So the certification should be a written warranty from the shipper with indemnity behind it, because if that number is wrong, what you are hauling is an undeclared hazmat shipment and the truck is yours.
The conditions are also all-or-nothing. Steel, rigid plastic or composite I B Cs. Not over 2,100 litres, which is 550 gallons. Packing group two or three only. Classes and divisions 3, 4.1, 5.1, 6.1, 8 and 9 only. A fully enclosed trailer. Highway or rail, going to a reconditioning, remanufacturing, requalification, disposal or repair facility. Break one and you have not bent the exception. You are outside it, with no papers and no placards.
And brief the drivers. A load that is federally legal without papers is still going to produce a long conversation at a scale house this autumn, with an officer whose own association told P H M S A this could not be verified.
Kept honest, and this one needs it. The endorsement chain is my reading of the C F R, not something P H M S A said. The agency never writes that the hazmat endorsement stops being required. I am following the text: 173.29(d) removes subpart F placarding, 383.5 defines hazmat by reference to being “required to be placarded under subpart F,” and 383.93(b)(4) hangs the endorsement on that definition. I think that chain holds and I would defend it — but it is an inference, and I would confirm it with your own counsel before you put a non-endorsed driver on the load. The same goes further, and gets weaker, for two others. 172.600(d) excepts emergency response information for material “excepted from the shipping paper requirements,” which reads to me as taking the 24-hour phone number with it. And 397.1(a) keys hazmat routing to vehicles that must be placarded under 177.823. Each additional step is one more inference; treat them in that order of confidence. This is a final rule with a complete record. The N P R M ran at 90 F R 28566 on July 1, 2025 and comments closed September 2, 2025. Nobody skipped process here. The drums are still marked and labelled. 173.29(d)(5) preserves subpart D and E marking and labelling on the I B Cs themselves — a responder who gets close can identify the material. This is not “nobody will know what is in there.” Federal law is on P H M S A’s side against the states. The rule preempts state, local and Tribal requirements that are not “substantively the same” under 49 U.S.C. 5125(b) for classification, placarding and shipping documents, so do not expect a state to save you the argument. The C V S A quotes are P H M S A summarising C V S A. They are exact quotes of the preamble, not of C V S A’s filing, which sits on the docket as P H M S A dash 2025 dash 0104 dash 0009 and which I did not pull. And the $14.4 million you may see attached to this batch belongs to a different rule in it — H M dash 268C, on lithium batteries as materials of trade. H M dash 268P carries no cost estimate at all.
Sources, all primary, all fetched today, August 6, 2026. (1) P H M S A, Hazardous Materials: Adoption of Department of Transportation Special Permit 21478, final rule, 91 F R 49335–49340, F R Doc. 2026-15820, Docket No. P H M S A-2025-0104 (H M-268P), R I N 2137-AG18, published August 4, 2026 (Vol. 91, No. 148), effective September 3, 2026, signed July 31, 2026 by Administrator Paul J. Roberti — full text read via the Federal Register plain-text service, 2026-15820.txt; official P D F at govinfo; public permalink here. Source of the summary language on removing shipping papers, placards and U N I D numbers; of the effective date; of the amendatory text of new 49 C F R 173.29(d), (d)(1), (d)(4) and (d)(5) quoted above; of P H M S A’s characterisation of the C V S A and William Forbes comments and its responses to them; of the “more than 40 entities” and no-reported-incidents statement; of the Paperwork Reduction Act estimate of 44 respondents and 2,200 shipments per year at 30 seconds each; and of the preemption discussion under 49 U.S.C. 5125(b). (2) Federal Register JSON API record for F R Doc. 2026-15820 — source of the 218 page views figure, timestamped 2026-08-06 08:15:04 −0400, and of the count of sixteen P H M S A final rules published August 4, 2026. (3) e C F R, 49 C F R 383.5 and 49 C F R 383.93(b)(4), read through the e C F R versioner A P I at the August 4, 2026 point-in-time — source of the definition of hazardous materials as material “required to be placarded under subpart F of 49 C F R part 172” and of the endorsement requirement that depends on it. 49 C F R 172.600(d), 172.504, 177.823 and 397.1 were read the same way for the caveat paragraph. (4) The predicate N P R M, 90 F R 28566, F R Doc. 2025-12090, published July 1, 2025, comments closed September 2, 2025 — confirmed through the same A P I. No trade press supplied any fact in this edition; at the time of writing I could not find any that had covered this rule.
PHMSA published sixteen final rules on August 4. This is the one nobody is reading — 218 page views two days in — and it changes who is allowed to drive a specific kind of load. Empty chemical totes going back to a reconditioner. Unglamorous, steady freight. Always been a hazmat move, because an empty IBC isn't empty. On September 3, for a narrow set of those loads, it stops being one. New 49 CFR 173.29(d) removes three things: shipping papers, placards on the vehicle, and the UN ID number markings. PHMSA lists all three in its own summary. The fourth thing isn't in the rule. PHMSA wrote that these vehicles "are not subject to the subpart F (placarding)" requirements. Placarding is how other rulebooks decide whether they apply to you. 49 CFR 383.5 — the CDL rules — defines hazardous materials, for endorsement purposes, as material "required to be placarded under subpart F of 49 CFR part 172." 49 CFR 383.93(b)(4) requires the hazmat endorsement for drivers "used to transport hazardous materials as defined in § 383.5." Not required to be placarded. So not hazardous materials as 383.5 defines them. So no endorsement required. Nobody wrote "the hazmat endorsement no longer applies." They didn't have to. They changed the fact the definition was pointing at. Here is the entire document that replaces the shipping paper, quoted in full from 173.29(d)(4): "A document (in paper or electronic form) must accompany the shipment of IBCs that denotes the phrase ``Residue IBC(s)'' and indicates the number of IBCs containing hazardous materials for each Class or Division of material transported" Two words and a tally. No chemical name. No UN number. No emergency phone number. PHMSA budgeted thirty seconds to produce it, and says it "ensures that inspectors and emergency responders can quickly identify the type and quantity of hazardous materials present." It's a quantity and a class. It isn't a type. CVSA said so during comments — the Commercial Vehicle Safety Alliance, whose members are the inspectors on your scales. PHMSA's own summary of it: "CVSA believes that eliminating the requirement for shipping papers on the transport vehicle introduces a significant safety risk by decreasing the ability of inspectors and emergency responders to verify proper segregation of hazardous materials." They also called the quantity limits "unenforceable." PHMSA replied that they "can be effectively verified through established oversight practices such as routine inspections and documentation reviews." The documentation being reviewed is the two-word one. Final as proposed. My position, and you can disagree: Take the exception if the lane justifies it — and rewrite the shipper agreement first. 173.29(d)(1) says "the offeror must ensure" no more than 0.3% by weight of residue remains. The offeror. Your driver can't weigh residue in a sealed tote, and by CVSA's own account an inspector can't check it. Make it a written warranty with indemnity behind it, because if that number is wrong you are hauling an undeclared hazmat shipment and the truck is yours. The conditions are all-or-nothing: steel, rigid plastic or composite IBCs, no more than 2,100 L (550 gal), packing group II or III, classes 3/4.1/5.1/6.1/8/9, fully enclosed trailer, going to a reconditioning, remanufacturing, requalification, disposal or repair facility. Break one and you're not bending the exception. You're outside it, with no papers and no placards. Kept honest: the endorsement chain is my reading of the CFR, not a PHMSA statement — confirm it with counsel before you put a non-endorsed driver on the load. The same reading, one step weaker, takes the 24-hour emergency phone number with it under 172.600(d). This is a final rule with a full record; the NPRM ran July 1, 2025 and comments closed that September. The drums themselves stay marked and labelled under 173.29(d)(5) — the identification moved from the trailer to the container, it didn't vanish. And PHMSA's own estimate is 2,200 shipments a year, so this is a permission going from special-permit-only to generally available, not a flood. 91 FR 49335. Effective September 3.
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FIRST SOURCE · one verified original-source finding, composed for one reader · this edition: trucking — written for the people whose customers ask what changed before the invoice does