When articles entered under bond, under any provision of law, are destroyed within the bonded period as provided for in
section 1557 of this title, or are destroyed within the bonded period by death, accidental fire, or other casualty, and proof of such destruction is furnished which shall be satisfactory to the Secretary of the Treasury, in which case any accrued duties shall be remitted or refunded and any condition in the bond that the articles shall be exported shall be deemed to have been satisfied.