application of duty-free treatment under title V of the Trade Act of 1974 ( 19 U.S.C. 2461 et seq.) with respect to Burma after the date on which the authority of subsection (a) is exercised only if the President submits to the appropriate congressional committees a certification that contains a determination of the President that the Government of Burma— (1) allows for the safe, voluntary, and dignified return of Rohingya refugees