Federal Hemp Bill & THCA Ban Tracker — 2026
As of April 2026, hemp-derived THCA remains federally legal under the 2018 Farm Bill (Public Law 115-334), which defines hemp as cannabis containing no more than 0.3% delta-9-tetrahydrocannabinol by dry weight and does not regulate THCA directly. Multiple bills in the 119th Congress propose closing this loophole through a “total THC” definition; none have passed. Sixteen states have already restricted or banned high-THCA hemp products through their own statutes.
This is THCAmap’s running record of every federal bill, every DEA and USDA rulemaking, every state ban, and every court ruling that affects whether you can legally buy, ship, possess, or sell THCA in the United States. We update it weekly. Last reviewed 2026-04-28.
If you are looking for a specific state’s status, jump to the state-by-state map below or visit /legal/.
The current federal status
Hemp-derived THCA is legal under federal law. The 2018 Agriculture Improvement Act — Public Law 115-334, signed by President Trump on December 20, 2018 — removed “hemp” from the federal Controlled Substances Act schedule and defined it as:
“the plant Cannabis sativa L. and any part of that plant, including the seeds thereof and all derivatives, extracts, cannabinoids, isomers, acids, salts, and salts of isomers, whether growing or not, with a delta-9 tetrahydrocannabinol concentration of not more than 0.3 percent on a dry weight basis.”
Two textual choices in that statute are why THCA flower exists as a legal product:
- The threshold measures delta-9 THC, not total THC. Pre-decarbed hemp flower can contain 20%+ THCA and still test below 0.3% Δ9-THC.
- The phrase “all derivatives, extracts, cannabinoids, isomers, [and] acids” explicitly includes acid-form cannabinoids like THCA in the definition of legal hemp, provided the Δ9-THC compliance test passes.
The DEA’s 2020 Interim Final Rule and the USDA’s 2021 Final Rule on Hemp Production preserved this delta-9-only compliance test for harvest-stage testing. The result: a legal commercial market in THCA flower, pre-rolls, vapes, diamonds, and edibles that produce identical pharmacology to traditional cannabis once heated.
Federal bill status timeline
This timeline tracks every relevant federal legislative action since the 2018 Farm Bill. Bills marked “active” are in the 119th Congress as of this update.
| Bill / Rule | Sponsor / Agency | Status | What it would change |
|---|---|---|---|
| 2018 Farm Bill (PL 115-334) | Congress | Signed Dec 20, 2018 | Legalized hemp at ≤0.3% Δ9-THC dry weight. The foundational statute. |
| DEA Interim Final Rule | DEA | Effective Aug 21, 2020 | Clarified that synthetic THCs remain Schedule I. Did not affect natural THCA. |
| USDA Final Hemp Production Rule | USDA / AMS | Effective Mar 22, 2021 | Codified the Δ9-only harvest test, established 1.0% negligence threshold. |
| 2018 Farm Bill — original expiration | Congress | Sept 30, 2023 | Triggered the rolling extension cycle below. |
| Continuing Resolution (1st extension) | Congress | Nov 2023 | Extended Farm Bill provisions through Sept 30, 2024. |
| Continuing Resolution (2nd extension) | Congress | Sept 2024 | Extended through Sept 30, 2025. |
| Miller Amendment to 2024 House Ag bill | Rep. Mary Miller (R-IL) | Passed Ag Committee, did not reach floor | Would have redefined hemp as “total THC ≤ 0.3%” — Δ9 + (0.877 × THCA). Would have functionally banned current THCA flower market. |
| Mast Substitute Amendment | Rep. Brian Mast (R-FL) | Withdrawn 2024 | Similar total-THC framing, narrower scope. |
| 2025 Continuing Resolution (3rd extension) | Congress | Sept 30, 2025 | Extended through March 14, 2026 — current operative extension. |
| 2026 Farm Bill (House Ag draft) | House Ag Committee | Markup Q1 2026, active | Draft text reportedly contains a total-THC definition and a per-serving milligram cap on intoxicating hemp products. Final language not yet released. |
| 2026 Farm Bill (Senate Ag draft) | Senate Ag Committee | Hearings Q1 2026, active | Senate version more permissive — preserves delta-9 test but adds federal age-21 minimum and child-resistant packaging mandates. Conference reconciliation expected H2 2026. |
| CHIIP Act (S. xxxx) | Sen. Ron Wyden (D-OR) | Introduced 2025, active | Would create a federal regulatory framework for intoxicating hemp products, preserving market with FDA-style oversight. |
| HEMP Cannabinoid Safety Act | Various | Introduced 2025, active | Federal age-21, COA mandate, child-resistant packaging — does not change the delta-9 vs total-THC test. |
| HHS rescheduling petition (cannabis) | DEA / DOJ | Proposed rule Aug 2024, stalled | Would move marijuana from Schedule I to III. Affects medical cannabis, not hemp THCA, but reframes the federal landscape. |
For any bill marked active, the canonical source is congress.gov — search by bill number for current text, sponsor list, and vote tallies. We refresh this table weekly as bills move.
How the 2018 Farm Bill made THCA legal — by accident
The 2018 Farm Bill was written to legalize industrial hemp for fiber, grain, and CBD. The drafters did not anticipate a market for high-THCA flower because, in 2018, the chemistry of THCA wasn’t widely understood outside cannabis labs and the post-decarb potency wasn’t a commercial product.
The legal opening exists because of one design choice: the compliance test measures delta-9 THC by dry weight, not total THC. A flower can be 22% THCA and 0.25% Δ9-THC and pass the test. Once heated, that flower releases roughly 19% Δ9-THC by mass — equivalent to mid-shelf marijuana flower.
To understand the math, see our hemp primer and THCA explainer. The full statutory text lives at Public Law 115-334 on congress.gov, with the hemp definition in Section 10113 amending the Agricultural Marketing Act of 1946.
What a federal “total-THC” amendment would change
The phrase to watch in every active 2026 bill is “total THC.” The proposed federal definition mirrors the formula already used in many state hemp programs:
Total THC = Δ9-THC + (0.877 × THCA)
The 0.877 coefficient adjusts for the molecular-mass loss when THCA decarboxylates to Δ9-THC. The formula calculates the maximum Δ9-THC content the sample could produce after full decarboxylation. Applied to current commercial THCA flower:
| Scenario | THCA | Δ9-THC | Δ9 only — pass? | Total THC = Δ9 + 0.877×THCA — pass? |
|---|---|---|---|---|
| Typical THCA flower | 22.0% | 0.25% | Yes (≤0.3%) | No (19.5%) |
| Premium THCA diamonds | 95.0% | 0.20% | Yes | No (83.5%) |
| Genuinely low-THC hemp | 0.4% | 0.20% | Yes | Yes (0.55%) — still over |
| CBD-dominant hemp | 0.5% | 0.10% | Yes | Yes (0.54%) — still over* |
*Even legitimate CBD-dominant hemp would struggle to meet a strict 0.3% total-THC cap. The current House draft reportedly includes a 0.3% total-THC ceiling and a separate per-serving milligram cap on consumable products.
If a total-THC definition becomes federal law:
- The current commercial THCA flower market collapses on the federal level.
- Existing inventory becomes Schedule I as soon as the law takes effect, absent a transition period.
- Hemp-derived delta-8, delta-10, HHC, and other isomers may be separately addressed via the same bill — most active drafts also include a synthetic-cannabinoid clause.
- CBD products with full-spectrum profiles face new compliance costs.
The CHIIP Act and other regulatory-framework bills would preserve the market by creating a federal age-21, COA-mandated, FDA-supervised framework. Industry trade groups including the Hemp Industries Association, the US Hemp Roundtable, and the Cannabinoid Coalition support a regulatory path over a prohibition path.
State-by-state THCA legal map
Federal law sets the floor; states can and do regulate more strictly. As of April 2026, sixteen states have enacted statutes that effectively ban or severely restrict THCA flower at the state level, regardless of the federal hemp definition. The full state-by-state breakdown is at /legal/, with detailed pages for each.
States that have banned THCA flower or imposed total-THC limits:
- Arkansas — Act 629 (2023): total-THC limit, no THCA flower sales.
- Hawaii — total-THC limits enforced 2024.
- Idaho — strict 0% Δ9 standard, no hemp THCA market.
- Iowa — total-THC limit since 2024.
- Kansas — restricted; effectively no THCA flower market.
- Kentucky — total-THC enforced via state hemp program.
- Louisiana — Act 498 (2024): banned smokable hemp flower.
- North Dakota — total-THC, no smokable.
- Oregon — restricted; HB 3000 enforces total-THC.
- Rhode Island — restrictive cannabinoid framework.
- South Dakota — restricted.
- Tennessee — TCA 39-17-453 enforced 2024–2025; effectively bans high-THCA hemp.
- Utah — strict program oversight, total-THC compliance.
- Vermont — restricted; enforced cannabinoid law.
- Virginia — SB 903 (2023): 2 mg total-THC per package cap.
- Washington — restricted via WSLCB rules.
States with permissive THCA frameworks (legal under 2018 Farm Bill standard):
The clear-permissive list includes Texas, Florida, Georgia, North Carolina, South Carolina, Alabama, Mississippi, Indiana, Ohio, Pennsylvania, West Virginia, and others. Many of these have active legislative proposals that could change the picture in 2026 sessions.
How DEA, USDA, and FDA fit in
The federal hemp regime is split across three agencies, each with limited authority over the others:
- USDA regulates hemp cultivation. The Hemp Production Rule (7 CFR Part 990) sets sampling protocols, the 0.3% Δ9 compliance threshold, and the negligence standard. USDA does not regulate finished products.
- FDA regulates hemp-derived consumable products. FDA has issued cannabidiol enforcement letters since 2015, expanded warnings to delta-8 in May 2022 (and again in 2023), and held that THC and CBD cannot be marketed as dietary supplements. FDA enforcement on hemp-derived intoxicants has been narrowly targeted at health claims and pediatric exposures rather than blanket prohibition.
- DEA regulates controlled substances. The DEA’s 2020 Interim Final Rule clarified that synthetic THCs remain Schedule I. The DEA has not asserted authority to schedule naturally-occurring THCA from compliant hemp under the 2018 Farm Bill, but a policy shift or court ruling could change that.
Two outstanding federal questions:
- Does FDA need new statutory authority to regulate intoxicating hemp? FDA has signaled it does. Several 2026 bills include an FDA hemp-product authority section.
- Can DEA reschedule THCA without Congress? DEA has discretion under the CSA to schedule analogues, but the 2018 Farm Bill’s explicit inclusion of “acids” creates a statutory carve-out that would require legislation to remove.
Industry response and lobbying
Three trade groups dominate hemp-industry advocacy:
- Hemp Industries Association (HIA) — multiple court filings against state-level smokable bans, including challenges in Arkansas and Tennessee.
- US Hemp Roundtable — focuses on federal policy, supports CHIIP and FDA-framework legislation.
- Cannabinoid Coalition — emerging trade group focused on intoxicating hemp products specifically.
Federal lobbying spend on “hemp” topics tracked by OpenSecrets totaled approximately $4.8 million in 2024 and is on pace to exceed $6 million in 2025 disclosure cycles, with major contributions from cannabinoid manufacturers, hemp-flower retailers like Lucky Elk and Bay Smokes, and adjacent CBD operators including Secret Nature and Fern Valley Farms.
What you can do as a consumer
- Track bills directly. The canonical source is congress.gov — search “S.5335 farm bill” or “H.R.8467 farm bill” for current 119th Congress versions. Set up a free congress.gov account to receive bill alerts.
- Contact your representatives. Find your House member at house.gov and your senators at senate.gov. Hemp lobbyists report that constituent calls move committee votes more than direct industry pressure.
- Subscribe to /newsletter. Weekly THCAmap legal-news digest. We email when bills move, when states sign, and when courts rule.
- Buy from brands with transparent COAs. A federal ban scenario rewards manufacturers with clean compliance histories. Brands listed at /brands/ with verified COAs are best positioned to operate in any future regulated framework.
Federal hemp legislation timeline (2018–present)
| Date | Event | Source |
|---|---|---|
| Dec 20, 2018 | 2018 Farm Bill (PL 115-334) signed. Hemp removed from CSA. | congress.gov |
| Aug 21, 2020 | DEA Interim Final Rule clarifies synthetic THCs remain Schedule I. | federalregister.gov |
| Mar 22, 2021 | USDA Final Hemp Production Rule effective. | usda.gov |
| May 4, 2022 | FDA issues first wave of delta-8 warning letters. | fda.gov |
| Jul 13, 2023 | FDA expands hemp-cannabinoid enforcement letters. | fda.gov |
| Sept 30, 2023 | 2018 Farm Bill original expiration; first CR extension begins. | congress.gov |
| 2023–2024 | First wave of state THCA bans (AR, TN, LA, VA). | state legislatures |
| Sept 2024 | Miller Amendment passes House Ag Committee but does not reach floor vote. | congress.gov |
| Aug 2024 | DEA proposes cannabis rescheduling rule. | federalregister.gov |
| Sept 30, 2025 | Third CR extension; 2018 Farm Bill provisions extended to Mar 14, 2026. | congress.gov |
| Q1 2026 | House Ag Committee markup of 2026 Farm Bill begins. | congress.gov |
| April 2026 | This article’s last review date. Bills active in conference. | THCAmap |
Pending legal challenges
Three court cases worth watching:
- AK Futures LLC v. Boyd Street Distro (9th Cir. 2022) — already decided. The Ninth Circuit held that delta-8 derived from hemp is legal under the 2018 Farm Bill. Establishes the precedent most circuit courts have followed for hemp-derived isomers and acids.
- Hemp Industries Association v. Arkansas (E.D. Ark., ongoing) — challenges Act 629’s smokable-flower ban on preemption grounds.
- Tennessee retailer challenges to TCA 39-17-453 — multiple suits filed; outcomes pending.
If any of these produces a circuit-level ruling against hemp THCA, the political path of the 2026 Farm Bill changes significantly.
How “total THC” math works in practice
Quick example using Tennessee’s enforcement formula (now applied in roughly half of the restrictive states):
A flower lab-tested at 18% THCA and 0.20% Δ9-THC. Total THC = 0.20 + (0.877 × 18.0) = 16.0% The product is compliant under the federal Δ9-only test (0.20 ≤ 0.30) but fails any 0.3% total-THC standard.
For a deeper dive into total-THC math and why it changes everything, see /glossary/total-thc/ and our THCA vs THC comparison.
Frequently asked questions
Is THCA federally legal in 2026?
Yes, as of April 2026. Hemp-derived THCA remains federally legal under the 2018 Farm Bill (Public Law 115-334), which defines hemp by a 0.3% delta-9 THC dry-weight threshold and explicitly includes acids and isomers. The 2018 Farm Bill provisions are currently extended through March 14, 2026 via continuing resolution, with the 2026 Farm Bill in active conference.
When does the 2018 Farm Bill expire?
It originally expired September 30, 2023. Congress has passed three continuing-resolution extensions, the most recent extending provisions through March 14, 2026. The 2026 Farm Bill is in active drafting in both chambers; conference reconciliation is expected in the second half of 2026.
Will the 2026 Farm Bill ban THCA?
The current House Agriculture Committee draft contains a “total THC” definition that would functionally ban high-THCA hemp products. The Senate draft is more permissive. Final outcome depends on conference reconciliation. The CHIIP Act and other regulatory-framework bills offer an alternative path that preserves the market under FDA oversight.
What states have already banned THCA?
Sixteen states have effectively banned or severely restricted THCA flower through state-level statutes: Arkansas, Hawaii, Idaho, Iowa, Kansas, Kentucky, Louisiana, North Dakota, Oregon, Rhode Island, South Dakota, Tennessee, Utah, Vermont, Virginia, and Washington. See /legal/ for state-by-state detail.
What is “total THC”?
Total THC is a compliance formula: Total THC = delta-9-THC + (0.877 × THCA). The 0.877 coefficient adjusts for the mass loss during decarboxylation. It calculates the maximum Δ9-THC content a sample would produce if fully decarbed. The 2018 Farm Bill uses delta-9 only; many state programs and pending federal bills use total THC, which captures THCA flower under the threshold.
Can the DEA ban THCA without Congress?
In theory the DEA has authority under the Controlled Substances Act to schedule analogues, but the 2018 Farm Bill’s explicit statutory inclusion of “acids” and “isomers” within the legal hemp definition creates a carve-out that most legal scholars agree would require congressional action to remove. The DEA has not signaled an attempt to schedule THCA unilaterally.
What happens to existing THCA inventory if a federal ban passes?
Depends on transition language. The Miller amendment included no transition period — products would have become Schedule I on the effective date. Most current drafts include 90-to-365-day transition windows. Retailers in the legal-status states face additional state-level transition rules that may be more or less restrictive than federal.
How do I track the latest votes?
Three sources, in order: (1) congress.gov bill pages — the canonical text, sponsor list, and vote record; (2) the House and Senate Agriculture Committee press pages for markup schedules; (3) THCAmap’s weekly newsletter at /newsletter — we summarize each week’s movement.
Related reading
- /learn/what-is-hemp/ — the legal definition that started everything
- /learn/thca-vs-thc/ — why the loophole exists
- /learn/is-delta-8-safe/ — adjacent cannabinoid landscape
- /learn/thca-diamonds-guide/ — high-potency products under the same legal regime
- /glossary/total-thc/ — the math
- /glossary/farm-bill/ — definitional terms
- /glossary/federally-legal/ — what “federally legal” actually means
- /legal/ — every US state’s current status
Disclaimer: Educational tracking only — not legal advice. THCAmap monitors statutes, agency rules, and pending bills. Statutory language, agency interpretation, and state enforcement evolve weekly. Consult a licensed attorney for legal advice specific to your situation. Last reviewed 2026-04-28. 21+ only.