On or before November 30, 1975, and biennially thereafter, every public and private institution of higher education having fifteen (15) or more employees shall file with the Commission or its delegate executed copies of Higher Education Staff Information Report EEO-6 in conformity with the directions set forth in the form and accompanying instructions. Every institution of higher education shall retain at all times, for a period of three years a copy of the most recently filed Report EEO-6 at its central administrative office, at the central office of a separate campus or branch, or at an individual school which is the subject of the report, where more convenient. An institution of higher education shall make the same available if requested by the Commission or is representative under the authority of section 710 of the Act and 29 U.S.C. 161. It is the responsibility of the institutions above described in this section to obtain from the Commission or its delegate necessary supplies of the form.