; enforcement (1) Certification In order to be certified by the Administrator as a qualified HUBZone small business concern, a HUBZone small business concern shall submit documentation the Administrator stating that— (A) at the time of certification and at each examination conducted pursuant to paragraph (4), the principal office of the concern is located in a HUBZone and not fewer than 35 percent of its employees reside in a HUBZone; (B) the concern will attempt to maintain the applicable employment percentage under subparagraph (A) during the performance of any contract awarded to such concern on the basis of a preference provided under subsection (b); and (C) the concern will ensure that the requirements of section 46 are satisfied with respect to any subcontract entered into by such concern pursuant to a contract awarded under this section. (2) Verification In carrying out this section, the Administrator shall establish procedures relating to— (A) the filing, investigation, and disposition by the Administration of any challenge to the eligibility of a HUBZone small business concern to receive assistance under this section (including a challenge, filed by an interested party, relating to the veracity of documentation provided to the Administration by such a concern under paragraph (1))