What Michigan's R 420.507 Requires From Cannabis Ads

The Cannabis Regulatory Agency is Michigan's regulator for adult-use marijuana. Its advertising rule, R 420.507, sits in the CRA's consolidated marihuana rules PDF, and its history line reads "2020 AACS; 2022 MR 5, Eff. Mar. 7, 2022."

Every quotation in the table was checked against that PDF on Oct. 13, 2026.

Note the h. The required word is "marihuana," paired with the statement that the product is for adults 21 and older, and both belong in every ad.

The R 420.504(1)(j) warning set includes these four statements:

• "It is illegal to drive a motor vehicle while under the influence of marihuana."
• "National Poison Control Center 1-800-222-1222."
• "For use by individuals 21 years of age or older or registered qualifying patients only. Keep out of reach of children."
• A boxed warning: "WARNING: USE BY PREGNANT OR BREASTFEEDING WOMEN, OR BY WOMEN PLANNING TO BECOME PREGNANT, MAY RESULT IN FETAL INJURY, PRETERM BIRTH, LOW BIRTH WEIGHT, OR DEVELOPMENTAL PROBLEMS FOR THE CHILD."

The Cornell LII copy of the rule cites the warning paragraph as (k). The CRA's own PDF cites (j), so cite the CRA version in your compliance notes.

The health-claim line covers marketing as well as advertising, so hold your own copy to it, not only paid ads. Describe what a product is, such as its format and strain name, and leave out anything it is said to do for a condition.

The truthfulness line reaches offers too. A price or deal in an ad should match what the store will honor at the counter.

Because the audience test names "internet website," a dispensary site sits inside R 420.507, not beside it. Three points follow.

1. 1Audience. Keep reliable evidence of who reads your site, ready to show.
2. 2Product pages. Pages that market specific products are the first place to check for the "marihuana" wording and the warnings. Put the warnings in page text rather than inside an image, so visitors and search crawlers can both read them.
3. 3Content. Learn articles, product descriptions and meta descriptions follow the same no-health-claims line as ads.

R 420.507 does not mention billboards, loyalty programs, coupons, discounts, giveaways, age verification, social media or email. Ask the CRA about these before you publish rather than guess:

• The complete R 420.504(1)(j) warning set, beyond the four statements quoted above.
• Any billboard or outdoor placement rule outside R 420.507, plus your municipality's sign ordinance.
• Whether loyalty programs, discounts, coupons or giveaways carry terms of their own. Any promotion still has to be truthful and may not target anyone under 21.
• Whether, and how, a website must verify age.
• How the rules apply to social media, email, SMS and paid digital placements.

For the same questions in other states, start from the state-by-state guide to cannabis advertising laws. For how Google, Meta and other networks treat these ads before any state rule applies, see which ad platforms accept cannabis advertising. Bud Authority's free site audit covers search, not these legal points: it is an automated scan, and its report card appears on screen.