A person shall not retaliate or discriminate against a person because the person has done or was about to do any of the following:

1. (1) File a complaint under this Act.
2. (2) Testify, assist, or participate in an investigation, proceeding, or action concerning a violation of this Act.
3. (3) Oppose a violation of this Act.

(Source: P.A. 96-1426, eff. 1-1-11.)