https://uscode.house.gov/view.xhtml?req=granuleid:USC-prelim-title8-section1101&num=0&edition=prelim
(a) As used in this chapter-
(1) The term "administrator" means the official designated by the Secretary of State pursuant to section 1104(b) of this title.
(2) The term "advocates" includes, but is not limited to, advises, recommends, furthers by overt act, and admits belief in.
(3) The term "alien" means any person not a citizen or national of the United States.
(4) The term "application for admission" has reference to the application for admission into the United States and not to the application for the issuance of an immigrant or nonimmigrant visa.
(5) The term "Attorney General" means the Attorney General of the United States.
(6) The term "border crossing identification card" means a document of identity bearing that designation issued to an alien who is lawfully admitted for permanent residence, or to an alien who is a resident in foreign contiguous territory, by a consular officer or an immigration officer for the purpose of crossing over the borders between the United States and foreign contiguous territory in accordance with such conditions for its issuance and use as may be prescribed by regulations. Such regulations shall provide that (A) each such document include a biometric identifier (such as the fingerprint or handprint of the alien) that is machine readable and (B) an alien presenting a border crossing identification card is not permitted to cross over the border into the United States unless the biometric identifier contained on the card matches the appropriate biometric characteristic of the alien.
(7) The term "clerk of court" means a clerk of a naturalization court.
(8) The terms "Commissioner" and "Deputy Commissioner" mean the Commissioner of Immigration and Naturalization and a Deputy Commissioner of Immigration and Naturalization, respectively.
(9) The term "consular officer" means any consular, diplomatic, or other officer or employee of the United States designated under regulations prescribed under authority contained in this chapter, for the purpose of issuing immigrant or nonimmigrant visas or, when used in subchapter III, for the purpose of adjudicating nationality.
(10) The term "crewman" means a person serving in any capacity on board a vessel or aircraft.
(11) The term "diplomatic visa" means a nonimmigrant visa bearing that title and issued to a nonimmigrant in accordance with such regulations as the Secretary of State may prescribe.
(12) The term "doctrine" includes, but is not limited to, policies, practices, purposes, aims, or procedures.
(13)(A) The terms "admission" and "admitted" mean, with respect to an alien, the lawful entry of the alien into the United States after inspection and authorization by an immigration officer.
(B) An alien who is paroled under section 1182(d)(5) of this title or permitted to land temporarily as an alien crewman shall not be considered to have been admitted.
(C) An alien lawfully admitted for permanent residence in the United States shall not be regarded as seeking an admission into the United States for purposes of the immigration laws unless the alien-
(i) has abandoned or relinquished that status,
(ii) has been absent from the United States for a continuous period in excess of 180 days,
(iii) has engaged in illegal activity after having departed the United States,
(iv) has departed from the United States while under legal process seeking removal of the alien from the United States, including removal proceedings under this chapter and extradition proceedings,
(v) has committed an offense identified in section 1182(a)(2) of this title, unless since such offense the alien has been granted relief under section 1182(h) or 1229b(a) of this title, or
(vi) is attempting to enter at a time or place other than as designated by immigration officers or has not been admitted to the United States after inspection and authorization by an immigration officer.
(14) The term "foreign state" includes outlying possessions of a foreign state, but self-governing dominions or territories under mandate or trusteeship shall be regarded as separate foreign states.
(15) The term "immigrant" means every alien except an alien who is within one of the following classes of nonimmigrant aliens-
(A)(i) an ambassador, public minister, or career diplomatic or consular officer who has been accredited by a foreign government, recognized de jure by the United States and who is accepted by the President or by the Secretary of State, and the members of the alien's immediate family;
(ii) upon a basis of reciprocity, other officials and employees who have been accredited by a foreign government recognized de jure by the United States, who are accepted by the Secretary of State, and the members of their immediate families; and
(iii) upon a basis of reciprocity, attendants, servants, personal employees, and members of their immediate families, of the officials and employees who have a nonimmigrant status under (i) and (ii) above;
(B) an alien (other than one coming for the purpose of study or of performing skilled or unskilled labor or as a representative of foreign press, radio, film, or other foreign information media coming to engage in such vocation) having a residence in a foreign country which he has no intention of abandoning and who is visiting the United States temporarily for business or temporarily for pleasure;
(C)(i) an alien in immediate and continuous transit through the United States, for a period not to exceed 29 days;
(ii) an alien who qualifies as a person entitled to pass in transit to and from the United Nations Headquarters District (as defined in section 4309a(e) of title 22) and foreign countries, under the provisions of paragraphs (3), (4), and (5) of section 11 of the Agreement regarding the Headquarters of the United Nations, done at Lake Success June 26, 1947 (61 Stat. 758); or
(iii) an alien passing in transit through the United States to board a vessel on which the alien will perform, or to disembark from a vessel on which the alien performed, ship-to-ship liquid cargo transfer operations to or from another vessel engaged in foreign trade, for a period not to exceed 180 days;
(D)(i) an alien crewman serving in good faith as such in a capacity required for normal operation and service on board a vessel, as defined in section 1288(a) of this title (other than a fishing vessel having its home port or an operating base in the United States), or aircraft, who intends to land temporarily and solely in pursuit of his calling as a crewman and to depart from the United States with the vessel or aircraft on which he arrived or some other vessel or aircraft;
(ii) an alien crewman serving in good faith as such in any capacity required for normal operations and service aboard a fishing vessel having its home port or an operating base in the United States who intends to land temporarily in Guam or the Commonwealth of the Northern Mariana Islands and solely in pursuit of his calling as a crewman and to depart from Guam or the Commonwealth of the Northern Mariana Islands with the vessel on which he arrived; or
(iii) an alien crewman performing ship-to-ship liquid cargo transfer operations to or from another vessel engaged in foreign trade, who intends to land temporarily solely in pursuit of the alien's responsibilities as a crewman and to depart from the United States on the vessel on which the alien arrived or on another vessel or aircraft, for a period not to exceed 180 days;
(E) an alien entitled to enter the United States under and in pursuance of the provisions of a treaty of commerce and navigation between the United States and the foreign state of which the alien is a national (or, in the case of an alien who acquired the relevant nationality through a financial investment and who has not previously been granted status under this subparagraph, the foreign state of which the alien is a national and in which the alien has been domiciled for a continuous period of not less than 3 years at any point before applying for a nonimmigrant visa under this subparagraph), and the spouse and children of any such alien if accompanying or following to join such alien; (i) solely to carry on substantial trade, including trade in services or trade in technology, principally between the United States and the foreign state of which the alien is a national; (ii) solely to develop and direct the operations of an enterprise in which the alien has invested, or of an enterprise in which the alien is actively in the process of investing, a substantial amount of capital; or (iii) solely to perform services in a specialty occupation in the United States if the alien is a national of the Commonwealth of Australia and with respect to whom the Secretary of Labor determines and certifies to the Secretary of Homeland Security and the Secretary of State that the intending employer has filed with the Secretary of Labor an attestation under section 1182(t)(1) of this title;
(F)(i) an alien having a residence in a foreign country which he has no intention of abandoning, who is a bona fide student qualified to pursue a full course of study and who seeks to enter the United States temporarily and solely for the purpose of pursuing such a course of study consistent with section 1184(l) 1 of this title at an established college, university, seminary, conservatory, academic high school, elementary school, or other academic institution or in an accredited language training program in the United States, particularly designated by him and approved by the Attorney General after consultation with the Secretary of Education, which institution or place of study shall have agreed to report to the Attorney General the termination of attendance of each nonimmigrant student, and if any such institution of learning or place of study fails to make reports promptly the approval shall be withdrawn, (ii) the alien spouse and minor children of any alien described in clause (i) if accompanying or following to join such an alien, and (iii) an alien who is a national of Canada or Mexico, who maintains actual residence and place of abode in the country of nationality, who is described in clause (i) except that the alien's qualifications for and actual course of study may be full or part-time, and who commutes to the United States institution or place of study from Canada or Mexico;
(G)(i) a designated principal resident representative of a foreign government recognized de jure by the United States, which foreign government is a member of an international organization entitled to enjoy privileges, exemptions, and immunities as an international organization under the International Organizations Immunities Act (59 Stat. 669) [22 U.S.C. 288 et seq.], accredited resident members of the staff of such representatives, and members of his or their immediate family;
(ii) other accredited representatives of such a foreign government to such international organizations, and the members of their immediate families;
(iii) an alien able to qualify under (i) or (ii) above except for the fact that the government of which such alien is an accredited representative is not recognized de jure by the United States, or that the government of which he is an accredited representative is not a member of such international organization; and the members of his immediate family;
(iv) officers, or employees of such international organizations, and the members of their immediate families;
(v) attendants, servants, and personal employees of any such representative, officer, or employee, and the members of the immediate families of such attendants, servants, and personal employees;
(H) an alien (i) [(a) Repealed. Pub. L. 106–95, §2(c), Nov. 12, 1999, 113 Stat. 1316 ] (b) subject to section 1182(j)(2) of this title, who is coming temporarily to the United States to perform services (other than services described in subclause (a) during the period in which such subclause applies and other than services described in subclause (ii)(a) or in subparagraph (O) or (P)) in a specialty occupation described in section 1184(i)(1) of this title or as a fashion model, who meets the requirements for the occupation specified in section 1184(i)(2) of this title or, in the case of a fashion model, is of distinguished merit and ability, and with respect to whom the Secretary of Labor determines and certifies to the Attorney General that the intending employer has filed with the Secretary an application under section 1182(n)(1) of this title, or (b1) who is entitled to enter the United States under and in pursuance of the provisions of an agreement listed in section 1184(g)(8)(A) of this title, who is engaged in a specialty occupation described in section 1184(i)(3) of this title, and with respect to whom the Secretary of Labor determines and certifies to the Secretary of Homeland Security and the Secretary of State that the intending employer has filed with the Secretary of Labor an attestation under section 1182(t)(1) of this title, or (c) who is coming temporarily to the United States to perform services as a registered nurse, who meets the qualifications described in section 1182(m)(1) of this title, and with respect to whom the Secretary of Labor determines and certifies to the Attorney General that an unexpired attestation is on file and in effect under section 1182(m)(2) of this title for the facility (as defined in section 1182(m)(6) of this title) for which the alien will perform the services; or (ii)(a) having a residence in a foreign country which he has no intention of abandoning who is coming temporarily to the United States to perform agricultural labor or services, as defined by the Secretary of Labor in regulations and including agricultural labor defined in section 3121(g) of title 26, agriculture as defined in section 203(f) of title 29, and the pressing of apples for cider on a farm, of a temporary or seasonal nature, or (b) having a residence in a foreign country which he has no intention of abandoning who is coming temporarily to the United States to perform other temporary service or labor if unemployed persons capable of performing such service or labor cannot be found in this country, but this clause shall not apply to graduates of medical schools coming to the United States to perform services as members of the medical profession; or (iii) having a residence in a foreign country which he has no intention of abandoning who is coming temporarily to the United States as a trainee, other than to receive graduate medical education or training, in a training program that is not designed primarily to provide productive employment; and the alien spouse and minor children of any such alien specified in this paragraph if accompanying him or following to join him;
(I) upon a basis of reciprocity, an alien who is a bona fide representative of foreign press, radio, film, or other foreign information media, who seeks to enter the United States solely to engage in such vocation, and the spouse and children of such a representative, if accompanying or following to join him;
(J) an alien having a residence in a foreign country which he has no intention of abandoning who is a bona fide student, scholar, trainee, teacher, professor, research assistant, specialist, or leader in a field of specialized knowledge or skill, or other person of similar description, who is coming temporarily to the United States as a participant in a program designated by the Director of the United States Information Agency, for the purpose of teaching, instructing or lecturing, studying, observing, conducting research, consulting, demonstrating special skills, or receiving training and who, if he is coming to the United States to participate in a program under which he will receive graduate medical education or training, also meets the requirements of section 1182(j) of this title, and the alien spouse and minor children of any such alien if accompanying him or following to join him;
(K) subject to subsections (d) and (p) 1 of section 1184 of this title, an alien who-
(i) is the fiancée or fiancé of a citizen of the United States (other than a citizen described in section 1154(a)(1)(A)(viii)(I) of this title) and who seeks to enter the United States solely to conclude a valid marriage with the petitioner within ninety days after admission;
(ii) has concluded a valid marriage with a citizen of the United States (other than a citizen described in section 1154(a)(1)(A)(viii)(I) of this title) who is the petitioner, is the beneficiary of a petition to accord a status under section 1151(b)(2)(A)(i) of this title that was filed under section 1154 of this title by the petitioner, and seeks to enter the United States to await the approval of such petition and the availability to the alien of an immigrant visa; or
(iii) is the minor child of an alien described in clause (i) or (ii) and is accompanying, or following to join, the alien;
(L) subject to section 1184(c)(2) of this title, an alien who, within 3 years preceding the time of his application for admission into the United States, has been employed continuously for one year by a firm or corporation or other legal entity or an affiliate or subsidiary thereof and who seeks to enter the United States temporarily in order to continue to render his services to the same employer or a subsidiary or affiliate thereof in a capacity that is managerial, executive, or involves specialized knowledge, and the alien spouse and minor children of any such alien if accompanying him or following to join him;
(M)(i) an alien having a residence in a foreign country which he has no intention of abandoning who seeks to enter the United States temporarily and solely for the purpose of pursuing a full course of study at an established vocational or other recognized nonacademic institution (other than in a language training program) in the United States particularly designated by him and approved by the Attorney General, after consultation with the Secretary of Education, which institution shall have agreed to report to the Attorney General the termination of attendance of each nonimmigrant nonacademic student and if any such institution fails to make reports promptly the approval shall be withdrawn, (ii) the alien spouse and minor children of any alien described in clause (i) if accompanying or following to join such an alien, and (iii) an alien who is a national of Canada or Mexico, who maintains actual residence and place of abode in the country of nationality, who is described in clause (i) except that the alien's course of study may be full or part-time, and who commutes to the United States institution or place of study from Canada or Mexico;
(N)(i) the parent of an alien accorded the status of special immigrant under paragraph (27)(I)(i) (or under analogous authority under paragraph (27)(L)), but only if and while the alien is a child, or
(ii) a child of such parent or of an alien accorded the status of a special immigrant under clause (ii), (iii), or (iv) of paragraph (27)(I) (or under analogous authority under paragraph (27)(L));
(O) an alien who-
(i) has extraordinary ability in the sciences, arts, education, business, or athletics which has been demonstrated by sustained national or international acclaim or, with regard to motion picture and television productions a demonstrated record of extraordinary achievement, and whose achievements have been recognized in the field through extensive documentation, and seeks to enter the United States to continue work in the area of extraordinary ability; or
(ii)(I) seeks to enter the United States temporarily and solely for the purpose of accompanying and assisting in the artistic or athletic performance by an alien who is admitted under clause (i) for a specific event or events,
(II) is an integral part of such actual performance,
(III)(a) has critical skills and experience with such alien which are not of a general nature and which cannot be performed by other individuals, or (b) in the case of a motion picture or television production, has skills and experience with such alien which are not of a general nature and which are critical either based on a pre-existing longstanding working relationship or, with respect to the specific production, because significant production (including pre- and post-production work) will take place both inside and outside the United States and the continuing participation of the alien is essential to the successful completion of the production, and
(IV) has a foreign residence which the alien has no intention of abandoning; or
(iii) is the alien spouse or child of an alien described in clause (i) or (ii) and is accompanying, or following to join, the alien;
(P) an alien having a foreign residence which the alien has no intention of abandoning who-
(i)(a) is described in section 1184(c)(4)(A) of this title (relating to athletes), or (b) is described in section 1184(c)(4)(B) of this title (relating to entertainment groups);
(ii)(I) performs as an artist or entertainer, individually or as part of a group, or is an integral part of the performance of such a group, and
(II) seeks to enter the United States temporarily and solely for the purpose of performing as such an artist or entertainer or with such a group under a reciprocal exchange program which is between an organization or organizations in the United States and an organization or organizations in one or more foreign states and which provides for the temporary exchange of artists and entertainers, or groups of artists and entertainers;
(iii)(I) performs as an artist or entertainer, individually or as part of a group, or is an integral part of the performance of such a group, and
(II) seeks to enter the United States temporarily and solely to perform, teach, or coach as such an artist or entertainer or with such a group under a commercial or noncommercial program that is culturally unique; or
(iv) is the spouse or child of an alien described in clause (i), (ii), or (iii) and is accompanying, or following to join, the alien;