There is no single US cannabis packaging law. Cannabis is still federally illegal, so every licensed state writes its own rules, and they change every year. That said, the rules overlap far more than they differ. Almost every state requires the same seven things on the retail package, and the differences are in the details: which symbol, which warning text, whether the package has to be opaque, and what counts as child-resistant. This is the common core, the places states diverge, and what to check before you print.
The seven things nearly every state requires
Child-resistant packaging. The retail package, or the outer package it sits in, must pass the CPSC 16 CFR 1700.20 test. Most states accept the same certification the federal government uses for medicines.
Tamper-evident seal. It has to be obvious if the package has been opened. A heat seal above a zipper, a tear strip, or a shrink band all count. Child-resistant and tamper-evident are different requirements and you need both.
The universal cannabis symbol. A state-specific THC warning symbol, usually a triangle or leaf, at a minimum size. Every state has its own artwork and you must use the one for the state you sell in.
Cannabinoid content. Total THC and CBD in milligrams, and for edibles, THC per serving and servings per package. Some states also want the percentage.
Warning statements. Standard text about intoxication, driving, pregnancy and keeping away from children. Each state has its own wording and minimum font size.
Traceability numbers. Batch or lot number, licence number of the producer, and often the packaging date and testing lab.
Not appealing to children. No cartoons, no candy or snack lookalikes, no bright characters. Some states go further and ban the word "candy" or any fruit imagery on edibles.
If your packaging carries all seven in the state-specific form, you are most of the way to compliant in any market.
Where states diverge
Opaque or not. California, Colorado and several others require edibles packaging to be opaque. Flower can usually be sold in a clear or window bag. Some states require all cannabis packaging to be opaque. This decides whether you can use a window bag at all.
Primary versus outer package. Some states accept a child-resistant exit bag at the till, so the product package itself doesn't need to be CR. Most states have moved away from that and require the product package to be CR on its own. A few require both.
Resealable. For multi-serve products, most states require the package to be resealable and child-resistant after every opening, not just the first. That rules out a tear-open pouch for a ten-pack of gummies.
Edible dose caps. 10mg per serving and 100mg per package is the most common cap. Some states cap lower for certain products, and some require each serving to be individually wrapped or scored.
Plastic and waste rules. A few states have started restricting single-use plastic or requiring recyclability statements. This is the fastest-moving area, and worth checking each year.
Symbol size and placement. The universal symbol has to be a minimum size, usually a half inch, on the principal display panel. Where "principal display panel" is on a bag versus a box is defined differently by state.
What this means for each format
Pre-roll boxes. A certified push-pull or side-squeeze carton with a fitted insert covers CR and tamper-evident in one piece. The symbol and warnings go on the front panel; batch and licence usually on the back. See pre-roll packaging.
Mylar bags. A certified CR zipper with a heat seal above it covers CR and tamper-evident. Print the panel space into the artwork rather than adding a sticker later. See custom mylar bags.
Edibles. Opaque, CR, resealable, with per-serving dosing on the panel and often individually wrapped pieces. The strictest category everywhere. See cannabis edibles packaging.
Vape cartridges and disposables. The carton is usually the compliant unit, since the hardware itself can't carry a full label. Certified CR carton with the panel on it.
Before you print, in order
Download your state's current packaging and labelling rule, not a summary. They're published by the state cannabis regulator and updated at least yearly.
Get the state's universal symbol artwork from the regulator, at the required minimum size.
Confirm whether your product package has to be CR on its own, or whether an outer package or exit bag counts.
Check the opaque rule for your product type.
Copy the exact warning text and minimum font size into the artwork.
Leave a clear area for the batch number, licence number and date, either printed on a label or in a panel you can overprint.
Ask your packaging supplier for the CPSC test report before you order. Certified means there is one. More on that in child-resistant packaging and how to choose a pre-roll packaging supplier.
Hemp and CBD are different
Hemp-derived CBD is federally legal under the 2018 Farm Bill and crosses state lines, which means it falls under FDA labelling rules for consumer products rather than state cannabis rules. In practice: ingredient list, net weight, manufacturer address, and no medical claims. Some states add their own CBD packaging rules on top. If you sell both THC and CBD, they are two separate compliance checklists.
Quick answers
Is there a federal cannabis packaging law? No. Each state sets its own rules. The child-resistance test (CPSC 16 CFR 1700.20) is the one federal standard states borrow.
Does all cannabis packaging have to be child-resistant? The retail package in every licensed US market, yes. Whether the product package or an outer package counts depends on the state.
What has to be on a cannabis label? The state's universal symbol, THC and CBD content, warning statements, batch and licence numbers, and for edibles, dose per serving and servings per package.
Does cannabis packaging have to be opaque? Edibles, in most states. Flower, in some. Check your state's rule for the product type.
How often do the rules change? Most states revise packaging rules yearly. Re-check before every reprint.
