; and (C) foreign law enforcement agencies, as appropriate and pursuant to a trade data exchange agreement or memorandum of understanding described in paragraph (2)(C). (d) Operation After a trade data exchange agreement or memorandum of understanding described in subsection (c)(2)(A)(iii) is signed with a country, the Executive Associate Director, in consultation with the Secretary of State, may assign Homeland Security Investigations criminal investigators to the country to provide training and technical assistance to the country in order to operationalize and maintain a Trade Transparency Unit in that country. (e) Authorization of appropriations (1) In general There are authorized to be appropriated to the Secretary of Homeland Security $4,100,000 for each of fiscal years 2024 through 2029 to establish and maintain Trade Transparency Units. (2) Prohibition on use of funds None of the funds authorized to be appropriated pursuant to the authorization of appropriations under paragraph (1) may be obligated or expended to carry out civil immigration enforcement or removal activities. . 4. Government Accountability Office review of barriers to harmonizing data systems of certain law enforcement agencies (a) In general Not later than one year after the date of the enactment of this Act, the Comptroller General of the United States shall submit to the appropriate congressional committees a report detailing the statutory, technical, and security barriers to harmonizing the data systems of relevant law enforcement agencies, including the Bureau of Alcohol, Tobacco, Firearms, and Explosives, the Federal Bureau of Investigation, the Drug Enforcement Administration, the United States Secret Service, the Diplomatic Security Service, the Financial Crimes Enforcement Network, and U.S. Customs and Border Protection, to improve data access necessary to facilitate trade-based money laundering investigations. (b) Assessment of new technologies The report required by subsection (a) shall include an assessment of the benefits and