Just when the United States Department of Agriculture (USDA) thought it knew the rules and laws that regulate legal hemp cultivation at the federal level, it went ahead and made several changes. This was after listening to what the public had said and what growers had learned about the 2020 growing season.
The new rules, which only came into force after the Farm Bill was passed in 2018, are both provisional and final. The provisions were published on 31 October 2019 and included an obligation for hemp growers to legally register, to test their plants for compliance with THC limits, and generally to stay out of trouble with the law.
The updated and final rules were entered into force on 22 March 2021. Since laws may vary from state to state and tribal area, compliance with the rules should be reviewed in each state.