J-2 visitors may request work authorization from United States Citizenship and Immigration Services (USCIS) by submitting form I-765. Adjudication typically takes between 3 and 5 months.
If approved, an Employment Authorization Document (EAD) will be issued, authorizing the J-2 visitor for employment for a period of up to one year. Applications for additional employment authorization may be submitted annually until the end of the J-2's status. However, some J-2 visa holders reported receiving EAD cards valid until the end of their J-2 visa.
J-2 visitors may enroll in academic programs as recreational or degree-seeking students. There are no enrollment requirements associated with J-2 status; students may enroll full- or part-time and discontinue their program at any time. J-2 visitors who have not completed their academic program by the time the principal J-1's status ends may petition for a change to F-1 student status, provided they are not subject to the Two-Year Home Residency Requirement. Not mentioned about the duration of this visa