the Secretary may, consistent with section 903(e) of this title, at any time allow frequencies allocated on a primary basis for Federal Government use to be used by non-Federal licensees on a mixed-use basis for the purpose of facilitating the prompt implementation of new technologies or services and for other purposes; and

the Commission shall make any allocation and licensing decisions with respect to such frequencies in a timely manner and in no event later than the date required by section 157 of this title.