; and (ii) provide instructions for withdrawing such petitions to such parties if the alien no longer desires the requested relief. (C) Deadline Absent exceptional circumstances, the Secretary shall make a final determination on each petition described in subparagraph (A) that is not withdrawn pursuant to subparagraph (B)(ii) not later than 180 days after the date of the enactment of this Act. (4) Biometrics and background checks (A) Submission of biometric and biographic data Petitioners for special immigrant status under this section shall submit biometric and biographic data in accordance with procedures established by the Assistant Director of Regional Processing. The Assistant Director shall provide an alternative procedure for applicants who are unable to provide all of the required biometric data due to a physical or mental impairment. (B) Background checks The Assistant Director shall utilize biometric, biographic, and other appropriate data to conduct security and law enforcement background checks of petitioners to determine whether there is any criminal, national security, or other ground that would render the applicant ineligible for special immigrant status under this section. (C) Completion of background checks The security and law enforcement background checks required under subparagraph (B) shall be completed, to the satisfaction of the Assistant Director, before the date on which a petition for special immigrant status under this section may be approved. 208. Central American Family Reunification Parole Program (a) In general If an alien is determined to be eligible for parole under subsection (b) pursuant to an assessment under section 205(d)(5)— (1) the designated processing center shall accept a completed application for parole filed by the alien, or on behalf of the alien by a parent or legal guardian of the alien