(1) Except as otherwise provided by this section, no person other than a veterinarian licensed to practice veterinary medicine in this jurisdiction and licensed by the commission may administer a prescription or controlled medication, drug, chemical or other substance (including any medication, drug, chemical or other substance by injection) to a horse at any location under the jurisdiction of the commission.

(2) Persons not licensed as veterinarians may administer the following substances, provided that, in post race testing the substances do not exceed approved quantitative levels, and the substances do not interfere with post race testing:

(a) A recognized nutritional supplement or other substance, except that any such supplements or substances that have been disapproved by an official veterinarian may not be administered;

(b) A substance given at the direction of or by a prescription issued by a licensed veterinarian; or

(c) A nonprescription medication or substance.

(3) No person, other than a licensed veterinarian, may possess a hypodermic needle, syringe or device used for intravenous or intramuscular injections on the grounds, unless approved by the stewards. On all grounds under the jurisdiction of the commission, veterinarians may use only onetime disposable needles, and shall dispose of them in a manner approved by the department of health.

(4) A person who has a medical condition requiring the use of a hypodermic needle, syringe or other device used for intravenous or intramuscular injections must possess a valid prescription issued by a physician licensed to practice medicine and prescribe medication. Such a person must control the storage and use of these devices and may be held accountable for any unauthorized use. Any person possessing a hypodermic needle or syringe without a valid prescription may be removed from the grounds.

(5) Veterinarians may not treat or administer medication or drugs to any horse on a race day before the post time for the race the horse is entered to run, except for the administration of furosemide under the guidelines set forth in WAC 260-70-650, unless first approved by an official veterinarian.