(a) A license holder shall notify the department at least 20 days before the date the license holder expects to harvest plants from a plot in the manner prescribed by department rule.
(b) A sample must be collected by the department or another entity described by § 122.151(a) for purposes of preharvest testing under § 122.153.

(c) The department by rule may prescribe reasonable procedures for submitting a preharvest sample collected under this section to a testing laboratory selected by the license holder.