; (B) the impact, if any, the amendment would have on screening operations, including effectiveness and efficiency; and (C) whether the amendment is consistent with international standards and guidance, including of the International Civil Aviation Organization; and (2) consult with appropriate aviation security stakeholders, including ASAC. (c) Exceptions Except for plastic or round bladed butter knives, the Administrator may not amend the interpretive rule described in subsection (a) to authorize any knife to be permitted in an airport sterile area or in the cabin of an aircraft. (d) Notification The Administrator shall— (1) publish in the Federal Register any amendment to the interpretive rule described in subsection (a)