private sector entities to share best practices, planning, and capabilities to respond to potential supply chain shocks. (D) Develop contingency plans and coordination mechanisms to ensure an effective and coordinated response to potential supply chain shocks. (3) Subgroups In carrying out the activities described in paragraph (2), the Assistant Secretary may establish subgroups of the unified coordination group established under paragraph (1) led by the head of an appropriate Federal agency. (4) International cooperation The Secretary, in consultation with other relevant Federal agencies, may cooperate or enter into agreements with governments of countries that are allies or key international partner nations of the United States relating to enhancing the security and resilience of critical supply chains in response to supply chain shocks. (d) Designations The Assistant Secretary shall— (1) not later than 270 days after the date of the enactment of this Act, designate— (A) critical industries