; (2) a method to mitigate such encroachment; and (3) a procedure to certify that such encroachment does not directly result in a national security risk to the covered site. (b) Considerations In developing the guidance required by this section, each Secretary of a military department shall consider the following: (1) The process by which a commander or head of a covered site identifies and reports encroachment with respect to such covered site. (2) Methods to track data relating to processes, methods, and procedures described in subsection (a). (3) Coordination processes to track and mitigate encroachment— (A) within each military department; and (B) between the military departments and the Assistant Secretaries of Defense for Sustainment and Industrial Base Policy. (c) Foreign investment encroachment Such guidance shall include a requirement that if a Secretary of a military department determines that encroachment described in subsection (a) involves or may involve foreign investment, such Secretary shall— (1) report information about encroachment relating to foreign investment to the Assistant Secretary of Defense for Industrial Base Policy; and (2) coordinate with the Assistant Secretary of Defense for Industrial Base Policy on efforts to mitigate such encroachment or potential encroachment. (d) Report Not later than 180 days after the date on which the guidance required by subsection (a) is issued, the Assistant Secretary of Defense for Sustainment, in coordination with the Secretaries of the military departments, shall submit to the Committees on Armed Services of the Senate and the House of Representatives a report on the guidance required by this section, including— (1) the extent to which such guidance has been implemented within the Department of Defense; (2) a description of methods to update any lists of covered sites