Any intimidation, threat, coercion, or retaliation by or with the approval of any sponsor against any person for the purpose of interfering with any right or privilege secured by title VII of the Civil Rights Act of 1964, as amended, Executive Order 11246, as amended, or because he or she has made a complaint, testified, assisted, or participated in any manner in any investigation proceeding, or hearing under this part shall be considered noncompliance with the equal opportunity standards of this part. The identity of complainants shall be kept confidential except to the extent necessary to carry out the purposes of this part, including the conduct of any investigation, hearing or judicial proceeding arising therefrom.