Any agreement for the sale or lease of any article on the United States Munitions List entered into by the United States Government after November 29, 1999, shall state that the United States Government retains the right to verify credible reports that such article has been used for a purpose not authorized under section
2754 of this title or, if such agreement provides that such article may only be used for purposes more limited than those authorized under section
2754 of this title, for a purpose not authorized under such agreement.