; (2) provide— (A) a full refund of the cost of the tickets for the young child and the accompanying adult, as well as any other individual on the same reservation; and (B) if such individuals are at a connecting airport, return air transportation for such individuals to their origination airport at no additional cost; or (3) transport the young child and the accompanying adult on their original ticketed flight segment in seats that are not adjacent, when seats on the aircraft are available. (e) Enforcement (1) In general An air carrier or foreign air carrier that violates a requirement of this section is subject to civil penalties as set forth in section 46301 and other applicable remedies under this part. (2) Investigations of complaints (A) In general The Secretary shall promptly investigate each complaint alleging a violation of this section that is received by the Department of Transportation. (B) Publication of data The Secretary shall publish data on complaints alleging violations of this section in a manner comparable to other consumer complaint data. (f) Exceptions Subsections (b) and (c) shall not apply to the extent that— (1) the young child does not have an accompanying adult traveling with such child; (2) an accompanying adult selects a seat apart from the young child or declines to accept a seat assignment or a seat that is adjacent to the seat assignment or seat of the young child offered without additional cost by the air carrier or foreign air carrier; (3) the number of young children traveling in the same party make it impossible for the air carrier or foreign air carrier to seat all the young children adjacent to an accompanying adult based on the seat layout of the aircraft