; (6) identifies and assesses ways BTTF under section 420, IBET units under section 437, and BEST units can better align operations, including interdiction and investigation activities; and (7) identifies and assesses gaps in BEST technological capability to detect transnational criminal organizations or terrorist threats. . (d) Updated report Not later than 180 days after the date of the enactment of this Act and biannually thereafter for the following six years, the Secretary of Homeland Security shall submit to the Committee on Homeland Security of the House of Representatives and the Committee on Homeland Security and Governmental Affairs of the Senate a report that— (1) describes the effectiveness of BEST units under section 432 of the Homeland Security Act of 2002 ( 6 U.S.C. 240 ), as amended by this Act; (2) assesses the impact of certain challenges on the sustainment of cross-border BEST operations, including challenges faced by international partners, and planned corrective actions; (3) assesses costs associated with BEST units, broken down by relevant categories designated at the Secretary’s discretion; (4) addresses ways to support joint training for BEST stakeholder agencies; (5) assesses how BTTF under section 420 of the Homeland Security Act of 2002 (as added by this Act), IBET units under section 437 of the Homeland Security Act of 2002 (as added by this Act), and BEST units can better align operations, including interdiction and investigation activities; and (6) assesses the gaps in BEST technological capability to detect cross-border tunnel threats. (e) Technical and conforming amendments Section 432 of the Homeland Security Act of 2002 ( 6 U.S.C. 240 ) is amended— (1) in subsection (c)— (A) in paragraph (1)(D), by inserting a semicolon at the end; and (B) in paragraph (3), by striking jurisdiction each place it appears and inserting region ; and (2) in subsection (d), in the matter preceding paragraph (1), by striking jurisdictions and inserting regions .