7 CFR 990.1 (USDA domestic hemp production program)

7 CFR Part 990 is USDA's domestic hemp production program rule. Section 990.1 sets the testing definitions.

[L2] Quoted from official text: "Acceptable hemp THC level. When a laboratory tests a sample, it must report the total delta-9 tetrahydrocannabinol content concentration level on a dry weight basis and the measurement of uncertainty. The acceptable hemp THC level for the purpose of compliance with the requirements of State or Tribal hemp plans or the USDA hemp plan is when the application of the measurement of uncertainty to the reported total …" Source: 7 CFR 990.1 (USDA domestic hemp production program)

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Authority tiers: L1 statute, L2 final/temporary rule, L3 official guidance, L4 pending bill/proposed rule, L5 news/lead/commentary (never law). Sources checked: 2026-10-30.