(a) A license holder shall harvest the plants from a plot not later than the 30th day after the date a preharvest sample is collected under § 122.154 unless field conditions delay harvesting or the department authorizes the license holder to delay harvesting. This subsection does not prohibit the license holder from harvesting the plants immediately after the preharvest sample is collected.
(b) A license holder may not sell or use harvested plants before the results of a preharvest and, if applicable, postharvest test performed on a sample representing the plants are received. If the test results are not received before the plants are harvested, the license holder shall dry and store the harvested plants until the results are received.

(c) A license holder may not commingle harvested plants represented by one sample with plants represented by another sample until the results of the tests are received.