; and (2) make available at least 500 megahertz of additional unlicensed spectrum in frequency bands above 5 gigahertz. (b) Incumbent protections With respect to any frequency band with respect to which the Commission conducts a system of competitive bidding under subsection (a)(1) (referred to in this subsection as the covered band ), the Commission— (1) may not proceed with any action (including relocating incumbents or registrants that are, as of the date of enactment of this Act, operational in the covered band from the covered band, or permitting new entrants into the covered band) if that action may result in the dislodging or harming of any such incumbent or registrant in the covered band until the Commission determines, including by requiring testing and technical studies, if appropriate, that any such action will neither cause harmful interference with nor unreasonably constrain any such incumbent or registrant in the covered band; and (2) if the Commission determines that the relocation of an incumbent or registrant from the covered band to another equivalent frequency band as a result of carrying out subsection (a)(1) is not possible, and if the Commission determines that no mitigation technology, alternative sharing approach, or incentives-based approach would reliably prevent harmful interference to incumbents or registrants in the covered band, shall provide a notification to the Committee on Commerce, Science, and Transportation of the Senate and the Committee on Energy and Commerce of the House of Representatives regarding those determinations. (c) Rule of construction Nothing in this section may be construed as preventing the Commission from— (1) completing a system of competitive bidding for the use of more than 500 megahertz of commercially licensed spectrum under subsection (a)(1)