Well, in 2018, the USDA put new regulations in the Farm Bill that further defined hemp as an agricultural crop. One of the most important regulations was the change in definition of allowable total-THC (delta9-THC + THCa x.877) in hemp flower and hemp products to 0.3% (+/- MU) total-THC. Each state with a hemp program was to have a compliance plan submitted by October of 2020, but the pandemic forced the USDA to extend that deadline to 2021. In the meantime, the USDA's IFRs (interim final rules) were modified slightly to include longer pre-harvest testing windows, extension of DEA certified lab requirements to 2022 and destruction/remediation requirements for non-compliance. What did not change was the 0.3% (+/- MU) total-THC requirement.
We forgot to go over that, didn't we? (+/- MU) means +/- measured uncertainty and it is a provision that accounts for the natural variability that can occur between multiple labs. It's also the reason why you'll see flower on our site that contains 0.34% total-THC.