053-7 Wyo. Code R. § 7-3
(a) Actions taken by an employer, or others, which adversely affect an employee may be predicated upon nondiscriminatory grounds. The prohibitions of this section apply when the adverse action occurs because the employee has engaged in protected activities. An employee's engagement in activities protected by the act does not automatically render him immune from discharge or discipline for legitimate reasons, or from adverse action dictated by non-prohibited considerations.
(b) To establish a violation of W.S. 27-11-109(e), the employee's engagement in protected activity need not be the sole consideration behind discharge or other adverse action. If protected activity was a substantial reason for the action, or if the discharge or other adverse action would not have taken place "but for" engagement in protected activity, the act has been violated.
053-7 Wyo. Code R. § 7-3