; (ii) refine the data described in clause (i) by using— (I) other data on access to broadband service obtained or purchased by the Commission; (II) other publicly available data or information on access to broadband service; and (III) other publicly available data or information on State broadband service deployment programs; and (iii) not determine an area is not an unserved area, an area with low-tier service, or an area with mid-tier service on the basis that one location within such area does not meet the definition of an unserved area, an area with low-tier service, or an area with mid-tier service. (B) Initial determination The Commission shall make an initial determination of the areas that are unserved areas, areas with low-tier service, and areas with mid-tier service and which anchor institutions are unserved anchor institutions not later than 270 days after the date of the enactment of this section. (C) Challenge of determination (i) In general The Commission shall provide for a process for challenging any initial determination regarding whether an area is an unserved area, an area with low-tier service, or an area with mid-tier service or whether an anchor institution is an unserved anchor institution that, at a minimum, provides not less than 45 days for a person to voluntarily submit information concerning— (I) the broadband service offered in the area, or a commitment to offer broadband service in the area that is subject to legal sanction if not performed