such passenger is on board an aircraft of such air carrier. (b) Responsibilities (1) Air carrier responsibilities An air carrier operating under part 121 of title 14, Code of Federal Regulations, shall— (A) notify the Administrator within 7 days of each instance in which a passenger violates the requirement of subsection (a) without a valid exception from such requirements under subsection (c) or subsection (d)(3) by providing the Administrator with such information regarding a violation as the Administrator may require