Unknown, but will probably be the standard 90 days.
J Charles Ferrari
Eng & Nishimura
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Keep in mind, we still don't know how long a deferred action grant or denial will take either. So there are two unknowns in your question - the deferred action time frame and the work permit time frame. You can find this information most likely after August 1, 2012 once the anticipated guidelines are released, or follow my firm website or Facebook page to get periodical updates.