(a) The commission veterinarian at greyhound racetracks and the test barn supervisor at horse racetracks shall select and directly supervise the test technicians who obtain specimens for conducting tests under this chapter. The rate of compensation to be paid to the technicians is subject to the approval of the executive secretary.(b) Except as authorized by the commission veterinarian, each specimen must be obtained in the test area approved by the Commission.(c) The owner, trainer, or kennel owner of a race animal being tested or a designee of the owner, trainer, or kennel owner is entitled to witness or acknowledge the taking of the specimen and is entitled to sign the tag for the specimen. Failure or refusal to be present and witness the collection of the specimen or to sign the specimen tag constitutes a waiver by the owner, trainer, or kennel owner of any objections to the source, collection procedures, and documentation of the specimen. A person signing a specimen tag under this section must be at least 18 years of age and be licensed by the Commission. A trainer or kennel owner may not designate another trainer or kennel owner to witness the collection of the sample or to sign a specimen tag unless a trainer responsibility form has been executed.