(1) has opposed any act or practice of the person which is collusive or in restraint of trade;

(2) has lodged a complaint or has testified, assisted, or participated in any manner with the Attorney General or a State's Attorney in an investigation of acts or practices which are collusive or in restraint of trade;

(3) is known by the person to be about to lodge a complaint or testify, assist, or participate in any manner in an investigation of acts or practices which are collusive or in restraint of trade; or

(4) is believed by the person to have acted as described in subdivision (1), (2), or (3) of this subsection. (Added 2011, No. 168 (Adj. Sess.), § 5, eff. May 18, 2012.)