(820 ILCS 265/20)
    Sec. 20. Employee access to project.
        (1) An employer may not permit an employee who violates Section 10, who tests positive
    
for the presence of a drug in his or her system, or who refuses to submit to drug or alcohol testing as required under the employer's substance abuse prevention program under Section 15 to perform work on a public works project until the employee meets the conditions specified in subdivisions (2)(A) and (2)(B). An employer shall immediately remove an employee from work on a public works project if any of the following occurs:
            (A) The employee violates Section 10, tests positive for the presence of a drug in
        
his or her system, or refuses to submit to drug or alcohol testing as required under the employer's substance abuse prevention program.
            (B) An officer or employee of the contracting agency, preferably one trained to
        
recognize drug and alcohol abuse, has a reasonable suspicion that the employee is in violation of Section 10 and requests the employer to immediately remove the employee from work on the public works project for reasonable suspicion testing.
        (2) An employee who is barred or removed from work on a public works project under
    
subsection (1) may commence or return to work on the public works project upon his or her employer providing to the contracting agency documentation showing all of the following:
            (A) That the employee has tested negative for the presence of drugs in his or her
        
system and is not under the influence of alcohol as described in Section 10.
            (B) That the employee has been approved to commence or return to work on the public
        
works project in accordance with the employer's substance abuse prevention program.
            (C) Testing for the presence of drugs or alcohol in an employee's system and the
        
handling of test specimens was conducted in accordance with guidelines for laboratory testing procedures and chain-of-custody procedures established by the Substance Abuse and Mental Health Service Administration of the U.S. Department of Health and Human Services.
        (3) Upon successfully completing a rehabilitation program, an employee shall be
    
reinstated to his or her former employment status if work for which he or she is qualified exists.
(Source: P.A. 95-635, eff. 1-1-08.)