(a) The following Department employees shall be tested for drug and alcohol use: (1) Applicants; (2) Those employees who have had a reasonable suspicion referral; (3) Post-accident employees, as soon as reasonably possible after the accident; and (4) HPR employees. (b) Only HPR employees shall be subject to random testing. (c) Employees shall be given at least a 30-day written notice from September 20, 1996, that the Department is implementing a drug and alcohol testing program and shall be given an opportunity to seek treatment. Following September 20, 1996, the Department shall procure a testing vendor and testing shall be implemented as described herein.