; (B) select up to 4 domestic ports to participate in the pilot program; and (C) select ports with unique features and differing levels of trade volume. (3) Report Not later than 1 year after initiating a pilot program under paragraph (1), the Secretary shall submit to the appropriate committees of Congress a report on the pilot program, including— (A) an evaluation of the scanning technologies proposed to improve security at domestic ports and to meet the full-scale implementation requirement; (B) the costs to implement a pilot program; (C) the benefits of the proposed scanning technologies; (D) the impact of the pilot program on the supply chain; and (E) recommendations for implementation of advanced cargo scanning technologies at domestic ports. (4) Sharing pilot program testing results The results of the pilot testing of advanced cargo scanning technologies shall be shared, as appropriate, with government agencies and private stakeholders whose responsibilities encompass the secure transport of cargo. 1980. Pipeline security study (a) Study The Comptroller General of the United States shall conduct a study regarding the roles and responsibilities of the Department of Homeland Security and the Department of Transportation with respect to pipeline security. (b) Contents The study under subsection (a) shall examine— (1) whether the Annex to the Memorandum of Understanding executed on August 9, 2006, between the Department of Homeland Security and the Department of Transportation adequately delineates strategic and operational responsibilities for pipeline security, including whether it is clear which department is responsible for— (A) protecting against intentional pipeline breaches and cyber attacks; (B) responding to intentional pipeline breaches and cyber attacks; and (C) planning to recover from the impact of intentional pipeline breaches and cyber attacks; (2) whether the respective roles and responsibilities of each department are adequately conveyed to relevant stakeholders and to the public