(G) A summary of the use of technology to detect illicit synthetic opioids and other illegal substances in international mail parcels and planned acquisitions and advancements in such technology. (H) Such other information as the Secretary of Homeland Security and the Postmaster General consider appropriate with respect to obtaining the transmission of information required by that subparagraph. (2) Consultations Not later than 180 days after the date of the enactment of this Act, and every 180 days thereafter until the Postmaster General has met the requirement under clause (vi) of section 343(a)(3)(K) of the Trade Act of 2002, as amended by subsection (a)(1), to arrange for the transmission of information with respect to not less than 95 percent of the aggregate number of mail shipments described in clause (i) of that section, the Secretary of Homeland Security and the Postmaster General shall provide briefings to the appropriate congressional committees on the progress made in achieving the transmission of that information for that percentage of shipments. (d) Government Accountability Office report Not later than December 31, 2020, the Comptroller General of the United States shall submit to the appropriate congressional committees a report— (1) assessing the progress of the United States Postal Service in achieving the transmission of the information required by subparagraph (K) of section 343(a)(3) of the Trade Act of 2002, as amended by subsection (a)(1), for the percentage of shipments required by that subparagraph