There are special rules for nonresident aliens holding certain kinds of non-immigrant visas. Below is a summary of the non-immigrant visa categories that may be helpful to you. All of these visas are limited in duration, so that upon their expiration the nonresident alien must leave the United States or obtain a new visa. The non-immigrant visa categories are:

• employees of foreign governments (A-visa holders);
• business visitors and tourists, usually limited to a 6-month stay (B-1 and B-2 visa holders);
• aliens in transit (C-visa holders);
• alien crew members of ships and aircraft (D-visa holders);
• treaty traders and investors (E-visa holders);
• students (F-visa holders);
• employees of international organizations (G-visa holders);
• temporary workers and trainees (H-visa holders);
• foreign correspondents (I-visa holders);
• exchange visitors (J-visa holders);
• fiancee of U.S. citizen (K-visa holders);
• intra-company transfers (L-visa holders);
• certain vocational trainees (M-visa holders);
• special category family members (N-visa holders);
• aliens of extraordinary ability in the sciences, arts, education, business, or athletics (O-visa holders);
• specially defined entertainers and athletes (P-visa holders);
• cultural exchange visitors (Q-visa holders);
• religious workers (R-visa holders);
• aliens assisting certain government investigations (S-visa holders);
• NATO representatives and certain related individuals (NATO visa holders); and
• "TC" and "TM" visas, issued to qualifying Canadian and Mexican residents under the North American Free Trade (NAFTA) provisions.

Of the above categories, special rules apply for nonresident aliens holding A-visas, F-visas, G-visas, J-visas, M-visas, and Q-visas.