This article is from the FAQ, by with numerous contributions by others.
You first submit the necessary forms and supporting documents to the
interested U.S. Government agency. If they decide to sponsor you for
a waiver, they send their recommendation to the USIA directly and
advise you of their action. The USIA sends you a `Data Sheet' which you
need to complete for their review. The USIA then makes a recommendation
to the INS to grant the waiver or otherwise.