7 C.F.R. § 990.26 – Responsibility of a USDA producer after laboratory testing is performed.

(a) The producer shall harvest the crop no later than thirty (30) days after the date of sample collection.
(b) If the producer fails to complete harvest within thirty (30) days of sample collection, a second pre-harvest sample of the lot shall be required to be submitted for testing.
(c) Harvested lots of hemp plants shall not be commingled with other harvested lots or other material.
(d) Lots that meet the acceptable hemp THC level may enter the stream of commerce.
(e) Lots that do not meet the acceptable hemp THC level are subject to § 990.27.
(f) Any producer may request additional pre-harvest testing if it is believed that the original total delta-9 tetrahydrocannabinol concentration level test results were in error. Additional testing may be conducted by the laboratory that conducted the initial test, or another laboratory.