The human resources commissioner shall establish and implement a drug screening program for applicants who seek the following employment:
(1) Positions at the Human Services Center or the South Dakota Developmental Center whose primary duty includes patient or resident care or supervision;
(2) Positions at the South Dakota State Veterans' Home whose primary duty includes patient or resident care or supervision;
(3) Safety sensitive positions; and
(4) Positions in the Department of Public Safety, Wildland Fire Suppression Division whose duties include firefighting.
The human resources commissioner may also establish and implement a drug screening program for employees holding those positions based upon reasonable suspicion of illegal drug use by any employee.