During first 9 months of study international students are allowed to work on campus part time i.e. 20 hours per week and during vacation they are allowed to work full time.
	After 9 months they need to take permission from university to work off campus. Spouse cannot work fulltime. They have to obtain work permit from USA to work full time.

Spouse cannot work fulltime. They have to obtain work permit from USA to work full time.

After study from USA:

After completion of studies students are allowed to stay in USA on OPT (Optional Practical Training) generally for one year whereas students of Science and Engineering get OPT of 27 (twenty-seven) months, during that duration students need to convert their student visa to a work permit visa (H1B) which can later on be converted to Green card.