; (ii) has not attained 18 years of age; and (iii) with respect to whom— (I) there is no parent or legal guardian in the United States; (II) no parent or legal guardian in the United States is available to provide care and physical custody; or (III) no sibling older than 18 years of age and no aunt, uncle, grandparent, or cousin older than 18 years of age is available to provide care and physical custody; and (B) does not include an alien if, at any time, the alien’s parent, legal guardian, sibling older than 18 years of age, or aunt, uncle, grandparent, or cousin older than 18 years of age is found in the United States and is available to provide care and physical custody. . (b) Revocation of designation The Secretary of Homeland Security and the Secretary of Health and Human Services shall revoke any designation of an alien as an unaccompanied alien child under section 462(g)(2) of the Homeland Security Act of 2002, as amended by subsection (a), upon the discovery of a relative of such alien described in subparagraph (B) of such section. 2004. Modifications to preferential availability for asylum for unaccompanied alien minors Section 208 of the Immigration and Nationality Act ( 8 U.S.C. 1158 ) is amended— (1) in subsection (a)(2), by striking subparagraph (E)