Not later than 24 months after the effective date of this chapter, the Comptroller General of the United States shall transmit a report to the Congress on the effectiveness of the provisions of this chapter in preventing the importation or exportation of rough diamonds that is prohibited under section 3903 of this title. The Comptroller General shall include in the report any recommendations on any modifications to this chapter that may be necessary.
19 USC § 3912
through Pub. L. 116-282, except Pub. L. 116-260