Cannabis laws in the US are written at two levels. Federal law bans marijuana, and each state sets its own rules for medical and adult use. Hemp-derived CBD with 0.3% THC or less is legal under federal law, and states decide how it is sold, labeled, and taxed.
Who sets cannabis laws in the US?
Congress and federal agencies set the floor. States then write possession limits, license systems, taxes, and age rules. That split is why a CBD product legal in one state can be restricted in the next.
What does federal law say about cannabis?
Marijuana sits on Schedule I of the Controlled Substances Act, which treats it as a drug with no accepted medical use. Hemp was removed from that schedule by the 2018 Farm Bill.
The Farm Bill defines hemp as cannabis with 0.3% THC or less by dry weight. That single number separates legal hemp from regulated marijuana.
What do states control?
- Possession limits for flower, concentrates, and edibles
- Whether medical use needs a doctor's recommendation or a state card
- Age minimums, which run 18 in some states and 21 in others
- Lab testing, packaging, and label rules for CBD
- Sales tax and license fees for cannabis sellers
How do state cannabis laws break down?
Most states fit one of four groups. The details change every session, so confirm your state's rules before you buy, carry, or ship a product.
- Adult use legal: marijuana sold to anyone 21 and older, with medical access folded in.
- Medical only: marijuana allowed with a doctor's recommendation and a state registry card.
- CBD only: low-THC cannabis products allowed, with tight caps on THC.
- Prohibited: most cannabis products banned, including some CBD forms.
A few states also cap retail THC below the federal 0.3% limit or require a permit to sell hemp products at all.
How does CBD fit into cannabis laws in the US?
CBD comes from the same plant as marijuana, but the source plant decides which law applies. Hemp-derived CBD is legal at the federal level. Marijuana-derived CBD follows state marijuana rules, not hemp rules.
The FDA has not approved CBD as a food ingredient, so drinks, gummies, and baked goods shipped across state lines sit in a gray area. Many states license and inspect CBD sellers anyway.
Does the source of the CBD matter?
Yes. Hemp is bred for fiber and seed, with THC kept low. Marijuana is bred for THC, so its CBD extracts carry far more of that compound.
Look for "hemp-derived" on the label. It tells you the product should meet the 0.3% federal limit and face your state's hemp testing rules.
What do state labeling rules require for CBD?
Most states set their own label standards: THC content per serving, net weight, warnings, and a batch code. Some require a QR code that links to the lab report.
Federal law covers health claims. That is why labels say "supports calm" instead of naming a disease or condition.
Can you take CBD across state lines?
Federal law does not block hemp CBD from crossing state lines. State and local police enforce the rules where you stand, and a few states restrict specific CBD products.
For air travel, keep the product in its original package with the lab report. TSA screens for threats, not drugs, and the law of your destination applies when you land.
Do cannabis laws affect online CBD orders?
Yes. A seller can lose a license for shipping to a state that bans the product, and a buyer can face a citation. Check the shipping policy and the list of states the store will not ship to.
Payment is a second hurdle. Many card networks restrict cannabis-linked sales, so some stores take bank transfer or cash on delivery.
What about delta-8 and other hemp-derived THC?
Hemp-derived delta-8 THC sits in a gap in the rules. Some states ban it, others regulate it like marijuana, and some have no rule at all.
If a product lists delta-8, delta-9, or THCA, treat it as a THC product and check your state law first.
How do you check cannabis laws in your state?
- Find your state agriculture department page on hemp licensing.
- Read the state statute for possession limits and age minimums.
- Check health department rules for CBD testing and labels.
- Look at city and county rules, since some towns ban CBD retail.
- Ask the seller for a batch certificate of analysis before you buy.
What should you check before buying CBD?
- THC content on the lab report, measured per batch
- Third-party lab name and test date
- State license or permit number for the seller
- Age limit that applies where you live
- Return policy if the product cannot ship to your state
Common questions about cannabis laws in the US
Is CBD legal in all 50 states?
Hemp-derived CBD with 0.3% THC or less is legal under federal law, and every state allows some form of it. A few states set tighter THC caps or require a license to sell.
Will CBD trigger a drug test?
Full-spectrum CBD can carry trace THC, and heavy use may build up enough to show on a screening. If you face testing, pick a CBD isolate and check the COA for THC.
Can a CBD store sell without a license?
That depends on the state. Some require a hemp handler or retail license, others do not. A seller who lists a license number is easier to verify.
Why do cannabis laws in the US change so often?
States amend cannabis statutes every legislative session, and agencies update testing and labeling standards in between. A rule that held last year may not hold now.