An acquisition which requires the consent or approval of the Board of Governors of the Federal Reserve System under section 25 or section 25(a) of the Federal Reserve Act, 12 U.S.C. 601, 615, shall be exempt from the requirements of the act if copies of all information and documentary material filed with the Board of Governors are contemporaneously filed with the Federal Trade Commission and Assistant Attorney General at least 30 days prior to consummation of the acquisition. In lieu of such information and documentary material or any portion thereof, an index describing such material may be provided in the manner authorized by § 802.6(a).