Nothing contained in this part shall be construed to require:

(a) Any person to file a report under this part unless he was a direct or indirect party to an agreement or arrangement of the kind described in § 406.2;

(b) Any person to file a report covering the services of such person by reason of his (1) giving or agreeing to give advice to an employer; or (2) representing or agreeing to represent an employer before any court, administrative agency, or tribunal of arbitration; or (3) engaging or agreeing to engage in collective bargaining on behalf of an employer with respect to wages, hours, or other terms or conditions of employment or the negotiation of an agreement or any question arising thereunder;

(c) Any regular officer, or employee of an employer to file a report in connection with services rendered as such regular officer, supervisor or employee to such employer;

(d) An attorney who is a member in good standing of the bar of any State, to include in any report required to be filed pursuant to the provisions of this part any information which was lawfully communicated to such attorney by any of his clients in the course of a legitimate attorney-client relationship.