What is Hemp-derived THC restriction?
The hemp-derived THC restriction is the change in US federal law closing the route by which intoxicating hemp products were sold outside the licensed cannabis channel.
Last checked 11 October 2026
Also calledhemp banfarm bill loophole
What the 2025 amendment actually does to the definition of hemp, what it does not do, when each part of it starts, and the one number in it that decides the fate of a cartridge.
Written and reviewed by Traceleaf research · last reviewed October 12, 2026
Why it matters
It removes the legal basis for a large share of the unlicensed vape market, which makes the question of who manufactured and imported that stock newly consequential.
Start with what it is not
“Hemp ban” is how this is searched, it is the phrase, not the statute. There is no federal prohibition on hemp. What happened is narrower and, for a vape, more consequential: the definition of the word “hemp” was rewritten, and products that fall outside the new definition stop being hemp. Nothing was banned; a boundary moved, and a category of product was left on the other side of it.
The distinction matters on this site because the two statements carry different claims. “Banned” asserts a prohibition on a named thing. “Outside the amended definition” describes where a product sits relative to a statutory threshold, which is checkable. Traceleaf publishes the second kind of statement only.
What the amendment does
That enumeration is the sentence to read twice if you are tracing vapes. A cartridge is named in the statute's own list of containers, and 0.4 milligrams is a quantity, not a concentration, it does not scale with the size of the device. A percentage threshold can be met by dilution. A per-container milligram cap on a sealed cartridge cannot.
When it starts
Why it changes a supply-chain question into an urgent one
A product channel that existed because of a threshold does not disappear when the threshold moves, the stock does not evaporate, the factories do not close, and the importers do not file anything new. What changes is that the question of who built and who imported that stock stops being a curiosity and starts being the only way to say anything about it at all.
Traceleaf's answer to that question is the chain: a factory, an exporter, a US importer of record, a brand, a seller, with a confidence level on every inferred link. The volume side is published as how many units are imported and the share consigned to importers with no state licence on file, and the brand side as the share of assessed brands with no licence found. The importers of record are named individually, because a consignee is usually the first identifiable US company in a chain that otherwise begins offshore.
State law is a separate layer and does not move with the federal definition. The states pages carry the licence lists and shelf prices per state, which is the only resolution at which “is this legal here” is a question with an answer.
Questions people ask
- Is hemp banned in the United States?
- No. Section 781 of Pub. L. 119–37 rewrote the statutory definition of hemp at 7 U.S.C. § 1639o rather than prohibiting hemp. Products that fall outside the amended definition are no longer hemp for the purposes of that subchapter.
- What is the new THC limit?
- A total tetrahydrocannabinols concentration, including THCa, of not more than 0.3 percent on a dry weight basis, replacing a threshold that measured delta-9 THC alone. For a final hemp-derived cannabinoid product, Section 781 adds a separate limit of 0.4 milligrams combined total per container.
- Does the per-container limit apply to a vape cartridge?
- The statute defines “container” as the innermost wrapping, packaging or vessel in direct contact with the final product, and its own list of examples includes a cartridge.
- When does it take effect?
- Section 781 is effective 365 days after its 12 November 2025 enactment, which is 12 November 2026. The Congressional Research Service reports that Pub. L. 119–103 delayed portions of the new definition to 11 December 2026. A further delay bill, H.R. 7010, has been introduced and not enacted.
Sources
Every claim on this page about a statute, an agency instrument or a tariff instrument rests on one of these, and each one is a document you can open. Where a claim could not be checked against a source, it was removed rather than hedged.
The operative text, including the 0.4 milligram per-container limit on final hemp-derived cannabinoid products and the statute's own definition of “container”, which lists a cartridge.
Still shows the delta-9-only measure, with the amendment recorded in the credits but not yet in the text, which is what “not yet in force” looks like in the code.
Effective dates, including the delay of portions to 11 December 2026 by Pub. L. 119–103.
What the Congressional Research Service itself describes as unresolved about the amended definition.
Introduced, not enacted. Status is checkable on congress.gov; nothing on this page assumes an outcome.