; or (IV) in the case of an individual under 18 years of age, a parent or legal guardian’s attestation under penalty of law as to the identity and age of the individual. (v) Authority to prohibit use of certain documents If the Secretary of Homeland Security finds, by regulation, that any document described in clause (i), (ii), or (iii) as establishing employment authorization or identity does not reliably establish such authorization or identity or is being used fraudulently to an unacceptable degree, the Secretary may prohibit or place conditions on its use for purposes of this paragraph. (vi) Signature Such attestation may be manifested by either a handwritten or electronic signature. (B) Individual attestation of employment authorization During the verification period (as defined in subparagraph (E)), the individual shall attest, under penalty of perjury on the form designated or established for purposes of subparagraph (A), that the individual is a citizen or national of the United States, an alien lawfully admitted for permanent residence, or an alien who is authorized under this Act or by the Secretary of Homeland Security to be hired, recruited, or referred for such employment. Such attestation may be manifested by either a handwritten or electronic signature. The individual shall also provide that individual’s social security account number or United States passport number (if the individual claims to have been issued such a number), and, if the individual does not attest to United States nationality under this subparagraph, such identification or authorization number established by the Department of Homeland Security for the alien as the Secretary may specify. (C) Retention of verification form and verification (i) In general After completion of such form in accordance with subparagraphs (A) and (B), the person or entity shall— (I) retain a paper, microfiche, microfilm, or electronic version of the form and make it available for inspection by officers of the Department of Homeland Security, the