be for a period of operation to begin not later than 6 months after the date of the enactment of this Act and to remain in operation for not longer than 6 months, absent extensions granted by the Commission pursuant to the procedures of the Commission relating to special temporary authority. (C) Electromagnetic spectrum described The electromagnetic spectrum described in this subparagraph for utilization on the temporary basis is any portion of the electromagnetic spectrum— (i) that is— (I) between the frequencies of 2496 megahertz and 2690 megahertz, inclusive