; and (B) an alien who is absent from the United States due to active service in the Armed Forces of the United States has not abandoned the alien’s residence in the United States during the period of such service. (e) Citizenship requirement (1) In general Except as provided in paragraph (2), an alien granted conditional permanent resident status under this Act may not have the conditional basis for permanent residency removed or be adjusted to permanent resident status unless the alien demonstrates to the satisfaction of the Secretary that the alien satisfies the requirements under section 312(a)(1) of the Immigration and Nationality Act ( 8 U.S.C. 1423(a)(1) ). (2) Exception Paragraph (1) shall not apply to an alien who the Secretary determines is unable because of a physical or developmental disability or mental impairment to meet the requirements of such paragraph. The Secretary, in coordination with the Secretary of Health and Human Services and the Surgeon General, shall establish procedures for making determinations under this subsection. (f) Payment of Federal taxes Not later than the date on which an application is filed under subsection (a) for adjustment of status, the alien shall satisfy any applicable Federal tax liability due and owing on such date. (g) Submission of biometric and biographic data The Secretary may not adjust the status of an alien under this section unless the alien submits biometric and biographic data, in accordance with procedures established by the Secretary. The Secretary shall provide an alternative procedure for applicants who are unable to provide such biometric or biographic data because of a physical disability or impairment. (h) Background checks (1) Requirement for background checks The Secretary shall utilize biometric, biographic, and other data that the Secretary determines appropriate— (A) to conduct security and law enforcement background checks of an alien applying for adjustment of status under this section