Here's the thing, nobody trusts what the administration or statutes say any more so entities like postal services in other countries are interpreting everything as a worst case scenario, instead of relying on good faith and mutual cooperation as they would previously.

Here's a summary by a law firm:

Normally that would be sufficient, but now we have an executive branch that tries strategies like personally suing all the federal judges in a district because it dislikes some of their rulings on one of the president's signature issues. CEOs of major corporations are literally giving the president lumps of gold to decorate the oval office. So you'll have to forgive me for discounting the value of legal opinions in general nowadays.