Paul Tomblin wrote:
In a previous article, none said:

This is ridiculous that a union is opposed to casual attire (slack &
collard shirts). I did not read suits.


It's ridiculous that an employer thinks they can arbitrarily change the
terms of employment without consulting the employees.

Perfectly legal in this case. The previous contract expired quite a
while ago. Negotiations broke down. The way federal law is written FAA
may impose their contract subject to approval by Congress. Congress
approved by not taking up the issue.