After instances of hemp and CBD companies encountering problems with local post offices regarding the legality of mailing hemp and CBD products, the US Postal Service has clarified and promulgated a new policy with the relevant provision below:
453.37 Hemp-based Products
For purposes of this section, “hemp” shall have the
meaning provided under federal law, including Section
10113 of the Agricultural Improvement Act of 2018, Pub.
L.115-334 (7 U.S.C. § 1639o), or any successor provision.
Hemp and hemp-based products, including cannabidiol
(CBD) with the tetrahydrocannabinol (THC) concentration
of such hemp (or its derivatives) not exceeding a 0.3 percent limit are permitted to be mailed only when:
a. The mailer complies with all applicable federal, state,
and local laws (such as the Agricultural Act of 2014
and the Agricultural Improvement Act of 2018) pertaining to hemp production, processing, distribution,
and sales; and
b. The mailer retains records establishing compliance
with such laws, including laboratory test results,
licenses, or compliance reports, for no less than 2
years after the date of mailing.
HT U.S. Hemp Roundtable