Except as provided in sub. (2m), in order to participate in a program, an individual who applies to participate in a program or who registers for a program under sub. (1) (c) 3. and, with respect to an individual applying for a program under sub. (1) (c) 4., all of the individual’s group members shall complete controlled substance abuse screening. If, on the basis of the screening results, the administering agency determines that there is a reasonable suspicion that an individual who is otherwise eligible for a program or any of the individual’s group members is abusing a controlled substance, the administering agency shall require the individual or group member to undergo a test for the use of a controlled substance.

Except as provided in sub. (4m), if the individual or group member refuses to submit to a test under par. (a), the individual is not eligible to participate in a program until the individual or group member complies with the requirement to undergo a test for the use of a controlled substance.