; and (II) require the official to explain the basis for registering such applicant to vote in such elections. (B) Process in case of certain discrepancies in documentation Subject to any relevant guidance adopted by the Election Assistance Commission, each State shall establish a process under which an applicant can provide such additional documentation to the appropriate election official of the State as may be necessary to establish that the applicant is a citizen of the United States in the event of a discrepancy with respect to the applicant’s documentary proof of United States citizenship. (3) State requirements Each State shall take affirmative steps on an ongoing basis to ensure that only United States citizens are registered to vote under the provisions of this Act, which shall include the establishment of a program described in paragraph (4) not later than 30 days after the date of the enactment of this subsection. (4) Program described A State may meet the requirements of paragraph (3) by establishing a program under which the State identifies individuals who are not United States citizens using information supplied by one or more of the following sources: (A) The Department of Homeland Security through the Systematic Alien Verification for Entitlements ( SAVE ) or otherwise. (B) The Social Security Administration through the Social Security Number Verification Service, or otherwise. (C) State agencies that supply State identification cards or drivers licenses where the agency confirms the United States citizenship status of applicants. (D) Other sources, including databases, which provide confirmation of United States citizenship status. (5) Availability of information (A) In general At the request of a State election official (including a request related to a process established by a State under paragraph (2)(A) or (2)(B)), the Secretary of Homeland Security and the Commissioner of the Social Security Administration shall, not later than 30 days after receipt of such request, provide the official