; (B) such relative has obtained, for the duration of his or her stay in the United States, a short-term travel medical insurance policy or an existing health insurance policy that provides coverage for international medical expenses; and (C) such relative expresses intent to leave the United States at the conclusion of the period of authorized admission. (3) Period of authorized admission The period of authorized admission for a nonimmigrant described in section 101(a)(15)(B)(iii) shall not exceed 90 days per calendar year. (4) Petitioner requirement (A) In general An individual may not petition for the admission of a relative as a nonimmigrant described in section 101(a)(15)(B)(iii) if the individual previously petitioned for the admission of such a relative who— (i) was admitted to the United States pursuant to a visa issued under that section as a result