; and (3) any other entity that the Assistant Secretary of Defense for Homeland Defense and Hemispheric Affairs determines is relevant to the execution of activities under subsection (c). (e) Report Not later than one year after the date of the enactment of this Act, the Secretary of Defense shall submit to the Assistant to the President for Homeland Security, the National Cyber Director, the head of any other relevant Sector Risk Management Agency, the Committees on Armed Services of the House of Representatives and the Senate, and, if the Secretary of Defense determines it appropriate, relevant private sector owners and operators of critical infrastructure a report on the activities carried out under pilot program under subsection (a), including a description of any operational challenges identified. (f) Definitions In this section: (1) The term critical infrastructure has the meaning given that term in the Critical Infrastructures Protection Act of 2001 ( 42 U.S.C. 5195c ). (2) The term Sector Risk Management Agency has the meaning given that term in section 2200 of the Homeland Security Act of 2002 ( 6 U.S.C. 650 ). 1518. Military cybersecurity cooperation with Taiwan (a) Requirement Not later than 180 days after the date of the enactment of this Act, the Secretary of Defense, acting through the Under Secretary of Defense for Policy, with the concurrence of the Secretary of State and in coordination with the Commander of the United States Cyber Command and the Commander of the United States Indo-Pacific Command, shall seek to engage with appropriate officials of Taiwan for the purpose of cooperating with the military forces of Taiwan on defensive military cybersecurity activities. (b) Identification of activities In cooperating on defensive military cybersecurity activities with the military forces of Taiwan under subsection (a), the Secretary of Defense may carry out efforts to identify cooperative activities to— (1) defend military networks, infrastructure, and systems