Cannabis and Hemp-Derived Products Subject to New Proposition 65 Warning Requirements in California

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California’s regulatory framework for cannabis and hemp-derived products, including CBD, continues to evolve, most recently via updated Proposition 65 warning requirements that came into full effect Jan. 3, 2021. As of that date, anyone offering for sale cannabis and hemp-derived products in California must provide an appropriate warning in accordance with the current regulations, with limited exceptions.

Noncompliance with the new regulations may result in government or private prosecution, with potential penalties of up to $2,500 per day for an alleged violation.

Proposition 65 Warning Requirement

California’s Safe Drinking Water and Toxic Enforcement Act of 1986, commonly known as Prop. 65, requires the state of California to maintain an updated list of chemicals known to the state to cause cancer or reproductive toxicity.

Persons or companies who offer products for sale in California containing Proposition 65-listed chemicals must provide a “clear and reasonable” warning to the consumer (with limited exceptions) or face the prospect of penalties. Businesses usually choose to apply either the standard or “short form” default warnings provided in the Proposition 65 regulations, as these are deemed presumptively “clear and reasonable,” whereas any other warning language runs the risk of being challenged as noncompliant.

Prior Proposition 65 Requirement Limited to Smokable Cannabis

“Marijuana smoke” was added to the Proposition 65 list in 2009 solely as a cancer-causing agent. After that date, a cancer-specific warning was required for all smokable cannabis. In addition, if a cannabis product contained other Proposition 65 listed chemicals—such as certain heavy metals or pesticides—warnings for those chemicals were also applicable.

However, THC was not a listed Proposition 65 chemical. As such, no warning was required for non-smokable cannabis products, including edibles or hemp-derived CBD products, unless those products contained other listed chemicals.

Until recently.

READ MORE: What Should California Dispensaries Know About Prop. 65? 

New Chemical Listings Expand Warning Requirement, Including to Hemp-Derived CBD

On Jan. 3, 2020, the state of California agency that oversees Proposition 65 (the Office of Environmental Health Hazard Assessment, known as OEHHA) updated the Proposition 65 list to add “cannabis (marijuana) smoke” as a reproductive toxin causing developmental harm (in addition to the prior listing as a cancer-causing agent) and add Δ9-tetrahydrocannabinol (Δ9-THC) as a reproductive toxin causing developmental harm.

The one-year grace period to provide adequate warnings based on these new listings expired on Jan. 3, 2021.

As such, to avoid a potential claim of a Proposition 65 violation:

persons offering for sale smokable marijuana should now be providing appropriate warnings that address both cancer and reproductive/developmental harm, and persons offering for sale any THC-containing products—including, but not limited to, edibles/concentrates/vapes and hemp-derived CBD products—should now be providing an appropriate reproductive harm warning.

It is important to note that the warning requirement applies to any products offered for sale as of Jan. 3, 2021, not just products manufactured or distributed to retailers after that date. Any items “on the shelf” (either physically or online) after Jan. 3, 2021 are subject to the newly applicable Proposition 65 warning requirements, regardless of packaging dates. Products sold online generally require online

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