Certain types of foreign visitors are allowed dual intent, and other categories of visitors are not. Persons with H-1B visas (for specialty workers and their spouses and minor children with H-4 visas), K visas (for fiancees or foreign spouses of US citizens and their minor children), L visas (for corporate transferees & their spouses and minor children), and V visas (spouses and minor children of lawful permanent residents) are permitted to have dual intent under the Immigration and Nationality Act
資料來源
http://en.wikipedia.org/wiki/Dual_intent