; and (B) the Secretary determines the reversion is necessary to protect the interests of the United States. (4) Safety air traffic services equipment in remote locations (A) Maintenance by Corporation Any equipment identified pursuant to subsection (a) and conveyed to the Corporation pursuant to paragraph (1) that is located in a noncontiguous State of the United States and is critical to the safe provision of air traffic services in that State may not be sold and shall be maintained and, as determined necessary by the Corporation, upgraded by the Corporation. (B) Equipment critical to safe provision of air traffic services For purposes of this paragraph, equipment critical to the safe provision of air traffic services includes GPS receivers, data link transceivers, ADS–B, multi-function displays, flight information services, moving map displays, terrain databases, airport lighting, and mountain pass cameras. (c) Consolidation and realignment of transferred services and facilities (1) In general At least 180 days before the date of transfer, and subject to section 91107, the Corporation, in consultation with representatives of labor organizations representing operations and maintenance employees of the air traffic control system, shall establish a process for the realignment and consolidation of services and facilities to be transferred to the Corporation from the FAA. (2) Moratorium Except as otherwise provided, there shall be a moratorium on any effort by the Administrator or the Corporation to consolidate or realign air traffic services or facilities until the process required by paragraph (1) is established. 90318. Approval of transferred air navigation facilities and other equipment On the date of transfer, the Corporation is authorized to operate all air navigation facilities and other equipment conveyed pursuant to section 90317 without additional approval or certification by the Secretary. 90319. Use of spectrum systems and data Beginning on the date of transfer, the Secretary shall provide the