; (2) the operation is being conducted for safety, security, or compliance oversight purposes and is authorized by the Administrator; or (3) the aircraft operation is conducted with the approval of the eligible entity. (h) Savings clause Nothing in this section may be construed as prohibiting the Administrator from authorizing the operation of an aircraft, including an unmanned aircraft system, over, under, or within a specified distance from an eligible large public gathering for which a temporary flight restriction has been established under this section or cancelling a temporary flight restriction established under this section. (i) Rule of construction Nothing in this section shall be construed to prevent the Administrator from using existing processes or procedures to meet the intent of this section. . (b) Clerical amendment The analysis for chapter 448 of title 49, United States Code, is further amended by adding at the end the following: 44812. Temporary flight restrictions for unmanned aircraft. . 936. Covered drone prohibition (a) Prohibitions The Secretary is prohibited from— (1) entering into, extending, or renewing a contract or awarding a grant— (A) for the operation, procurement, or contracting action with respect to a covered unmanned aircraft system; or (B) to an entity that operates (as determined by the Administrator) a covered unmanned aircraft system in the performance of such contract; (2) issuing a grant to a covered foreign entity for any project related to covered unmanned aircraft systems; and (3) operating a covered unmanned aircraft system. (b) Exemptions The Secretary is exempt from any prohibitions under subsection (a) if the grant, operation, procurement, or contracting action is for the purposes of testing, researching, evaluating, analyzing, or training related to— (1) unmanned aircraft detection systems and counter-UAS systems, including activities conducted— (A) under the Alliance for System Safety of UAS through Research Excellence Center of Excellence of the FAA