Every alien (other than a nonimmigrant described in subparagraph (L) or (V) of section
1101
(a)(15) of this title, and other than a nonimmigrant described in any provision of section
1101
(a)(15)(H)(i) of this title except subclause (b1) of such section) shall be presumed to be an immigrant until he establishes to the satisfaction of the consular officer, at the time of application for a visa, and the immigration officers, at the time of application for admission, that he is entitled to a nonimmigrant status under section
1101
(a)(15) of this title. An alien who is an officer or employee of any foreign government or of any international organization entitled to enjoy privileges, exemptions, and immunities under the International Organizations Immunities Act [
22 U.S.C.
288 et seq.], or an alien who is the attendant, servant, employee, or member of the immediate family of any such alien shall not be entitled to apply for or receive an immigrant visa, or to enter the United States as an immigrant unless he executes a written waiver in the same form and substance as is prescribed by section
1257
(b) of this title.