; or (B) individuals employed by contractors of the Department of Homeland Security who are subject to the supervision, control, or direction of the respective department and are assigned by that department to perform the duties described in subsection (a) in accordance with regulations or guidance established under subsection (d). (7) The terms unmanned aircraft and unmanned aircraft system have the meanings given those terms in section 331 of the FAA Modernization and Reform Act of 2012 ( 49 U.S.C. 40101 note). (l) Department of Homeland Security assessment (1) Report Not later than 1 year after the date of the enactment of this section, the Secretary shall issue an assessment to the appropriate congressional committees, including— (A) an evaluation of the threat from unmanned aircraft systems to United States critical infrastructure (as defined in this Act) and to domestic large hub airports (as defined in section 40102(a)(29) of title 49, United States Code); (B) an evaluation of current Federal and State, local, or tribal law enforcement authorities to counter the threat identified in subparagraph (A), including section 99.7 of title 14, Code of Federal Regulations, or any successor thereto; (C) an evaluation of the knowledge of, efficiency of, and effectiveness of current procedures and resources available to owners of critical infrastructure and domestic large hub airports when they believe a threat from unmanned aircraft systems is present and what additional actions, if any, the Department could implement under existing authorities to assist these entities to counter the threat identified in subparagraph (A); (D) an assessment of what, if any, additional authorities the Department needs to counter the threat identified in subparagraph (A)