(a) No person receiving assistance from or participating in any program or activity of the Department involving housing and related facilities shall engage in a discriminatory practice.

(b) Where such person has been found by the Department or any other Federal Department, agency, or court to have previously discriminated against persons on the ground of race, color, religion (creed), sex or national origin, he or she must take affirmative action to overcome the effects of prior discrimination.

(c) Nothing in this part precludes such person from taking affirmative action to prevent discrimination in housing or related facilities where the purpose of such action is to overcome prior discriminatory practice or usage or to overcome the effects of conditions which resulted in limiting participation by persons of a particular race, color, religion (creed), sex or national origin.