; and (4) by adding at the end the following: (C) Exception The Secretary may waive the limitation under subparagraph (B) related to projects that are the same if the Secretary determines that the community or consortium spent little or no money on its previous project or encountered industry or environmental challenges, due to circumstances that were reasonably beyond the control of the community or consortium. . (b) Authority To make agreements Section 41743(e)(1) is amended by adding at the end the following: The Secretary may amend the scope of a grant agreement at the request of the community or consortium and any participating air carrier, and may limit the scope of a grant agreement to only the elements using grant assistance or to only the elements achieved, if the Secretary determines that the amendment is reasonably consistent with the original purpose of the project. . 3204. Waivers Section 41732 is amended by adding at the end the following: (c) Waivers Notwithstanding section 41733(e), upon request by an eligible place, the Secretary may waive, in whole or in part, subsections (a) and (b) of this section or subsections (a) through (c) of section 41734. A waiver issued under this subsection shall remain in effect for a limited period of time, as determined by the Secretary. . IV NextGen and FAA organization 4001. Definitions In this title: (1) Administration The term Administration means the Federal Aviation Administration. (2) Administrator The term Administrator means the Administrator of the Federal Aviation Administration. (3) ADS–B The term ADS–B means automatic dependent surveillance-broadcast. (4) ADS–B Out The term ADS–B Out means automatic dependent surveillance-broadcast with the ability to transmit information from the aircraft to ground stations and to other equipped aircraft. (5) NextGen The term NextGen means the Next Generation Air Transportation System. A NextGen air transportation system 4101. Return on investment report (a) In general Not later than 1 year after the date of enactment