75. In the event that clearing is not feasible, we must prepare for the possibility that CSMAC may present a "hybrid" recommendation, in which some operations would be relocated, some would share the band with commercial licensees, and some (in geographic exclusion zones) would not share the band. If so, and if the NTIA endorses the CSMAC recommendations, we could adopt Protection Zones, Exclusion Zones, and other sharing measures to clearly define the potential for Federal and commercial operations to share the 1755-1780 MHz band (spectrally, geographically, temporally, dynamically, or any combination of these). We seek comment on what sharing measures would appropriately maximize commercial access to the spectrum. We intend to incorporate NTIA's forthcoming recommendations into the record of this proceeding and anticipate that commenters will discuss NTIA's recommendations in comments, reply comments, or ex parte presentations, as appropriate, depending on the timing. We also expect that commenters will discuss the CSMAC's specific recommendations as well as various implementation details, including on the coordination processes required for shared use of the band.
76. Anticipating the possibility that CSMAC and NTIA are unable to recommend clearly defined sharing parameters, we also seek comment on whether to issue "overlay" licenses that would permit new licensees to gain access to the 1755-1780 MHz band only if they are able to reach coordination agreements with affected Federal users, i.e., "operator-to-operator" coordination. Under this alternative, we would adopt rules to license the 1755-1780 MHz band on a non-harmful interference basis to, and subject to accepting harmful interference from, Federal incumbents that are not relocating or, if they are relocating, until they are relocated under an approved plan. We seek comment on this proposal.
77. Finally, as another alternative, we seek comment on the possibility that the 1755-1780 MHz band remain for exclusive Federal use and how that would affect the band configurations described in paragraphs 41-46 and our Spectrum Act obligation to identify an additional 15 megahertz of contiguous spectrum to allocate and auction for commercial use.
78. Industry Roadmap. As noted above, T-Mobile recently filed a wireless industry proposal (Industry Roadmap) for making the 1755-1780 MHz band available for commercial use in time to auction the band at the same time as the 2155-2180 MHz band, which the Spectrum Act requires to be auctioned and licensed by
79. DoD Alternative Proposal. Also, as noted above, on
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