; and (2) such Indian Tribe shall be presumed to have disclaimed interest in such undertaking. (b) Overcoming presumption (1) In general An Indian Tribe may overcome a presumption under subsection (a) upon making, to the Commission or a court of competent jurisdiction, a favorable demonstration with respect to 1 or more of the factors described in paragraph (2). (2) Factors considered In making a determination regarding a presumption under subsection (a), the Commission or court of competent jurisdiction shall give substantial weight to— (A) whether the applicant with respect to the relevant complete form failed to make a reasonable attempt to follow up with the applicable Indian Tribe not earlier than 30 days, and not later than 50 days, after the applicant submitted a complete FCC Form 620 or FCC Form 621 (as the case may be) to such Indian Tribe