It shall be an unlawful practice for a person or for two or more persons to conspire:

(1) To retaliate or discriminate in any manner against a person because the person has opposed a practice declared unlawful by this article or because the person has made a charge, filed a complaint, testified, assisted, or participated in any manner in any investigation, proceeding, or hearing concerning an unlawful practice under this article;

(2) To aid, abet, incite, compel, or coerce a person to engage in any of the acts or practices declared unlawful by this article;

(3) To obstruct or prevent a person from complying with this article or any order issued under this article;

(4) To resist, prevent, impede, or interfere with the administrator or any of his employees or a special master in the lawful performance of duty under this article; provided, however, that it shall not be a violation of this article for anyone to challenge or resist any action by the administrator or any of his employees or a special master when there is a good faith belief that the administrator or his employees or a special master is acting unlawfully or acting in excess of his statutory authority; or

(5) To initiate willfully frivolous and unwarranted charges of discrimination against a public employer.