I didn't mention TSA.

Most TSA, FAA, and airline operator policies and procedures are harmonized with ICAO and IATA policies and procedures. Of course, there are regional variations and differences between international and domestic flights within those regions, but for the most part things are consistent among all of the members of both signatories of Convention on International Civil Aviation (ICAO members) and IATA members.

The whole shoe thing was proposed someone who wasn't the US (I think the UK, but my memory is fuzzy-- damn cosmic rays), submitted to ICAO, voted on, and enacted by the US as a signatory.