United States-Canada Free-Trade Agreement
Public Law 100-449 (Act of 9/28/88) established a special, reciprocal trading relationship between the United States and Canada. It provided two new classes of nonimmigrant admission for temporary visitors to the United States-Canadian citizen business persons and their spouses and unmarried minor children. Entry is facilitated for visitors seeking classification as visitors for business, treaty traders or investors, intracompany transferees, or other business people engaging in activities at a professional level. Such visitors are not required to obtain nonimmigrant visas, prior petitions, labor certifications, or prior approval but must satisfy the inspecting officer they are seeking entry to engage in activities at a professional level and that they are so qualified. The United States-Canada Free-Trade Agreement was superseded by the North American Free-Trade Agreement (NAFTA) as of 1/1/94.
Source: U.S. Citizenship and Immigration Services