(a) It is the policy of the Government of the United States to provide equal opportunity in employment for all persons, to prohibit discrimination in employment because of race, color, religion, sex, national origin, age or handicap and to promote the full realization of equal employment opportunity through a continuing affirmative program in each agency.

(b) No person shall be subject to retaliation for opposing any practice made unlawful by title VII of the Civil Rights Act (title VII) (42 U.S.C. 2000e et seq.), the Age Discrimination in Employment Act (ADEA) (29 U.S.C. 621 et seq.), the Equal Pay Act (29 U.S.C. 206(d)) or the Rehabilitation Act (29 U.S.C. 791 et seq.) or for participating in any stage of administrative or judicial proceedings under those statutes.