Where probable cause exists in a first offense, the unit member shall be referred immediately to a district selected medical facility for a medical examination to determine work impairment and/or to undergo testing for the presence of a controlled substance. Such examination and testing shall occur the same day as the referral. With regard to testing, the unit member shall have three (3) options: (2) submit to testing for a controlled substance by a state approved laboratory and release the results to the district; (2) submit to testing by a state approved laboratory and decline to release the results to the district without prejudice, but agree to complete a substance abuse program; or (3) decline testing without prejudice and agree to complete a substance abuse program determined by the district in lieu of testing.