(a) After giving licensees an opportunity to obtain nationwide non-exclusive licenses, the Wireless Telecommunications Bureau shall, by public notice, establish procedures for licensees to file an initial set of site registrations (the initial site registration round).

(b) In the initial site registration round, licensees may register a maximum of two 100-megahertz channels at any given site.

(c) Sites registered in the initial registration round must be constructed and providing service within 120 days of the site registration being granted.

(d) If multiple site registrations with overlapping Phase One contours are filed during the initial site registration round, the Wireless Telecommunications Bureau will grant the earlier filed registration (based on the Universal Licensing System's time stamp). Both licensees shall then engage in Phase Two coordination with respect to the later-filed registration. The licensee with the later-filed registration may amend its application to facilitate coexistence with the other licensee so long as the amendment does not conflict with any other site registration filed during the initial window or with any existing or proposed Federal operations. If Phase Two coordination is successful, the later-filed registration will be successful. If, after good faith discussions and efforts to accommodate the later-filed registration, Phase Two coordination is not successful, the later-filed registration will be dismissed.