(III) Additional investigation If, as described in subclause (I), the Secretary considers an existing background investigation, security clearance determination, or both, as the case may be, for an applicant that has been carried out by a State, local, or Tribal Government, or by the Office of Justice Services (or by the Bureau of Indian Affairs before the date of enactment of this Act), the Secretary— (aa) may carry out additional investigation and examination of the applicant if the Secretary determines that such additional information is needed in order to make an appropriate determination as to the character and trustworthiness of the applicant before final adjudication can be made and a security clearance can be issued