somewhat in the know wrote:
No, the rules only apply if the event is used as a direct qualifier for an IAAF event (such as the Olympic Trials, World XC Trials, etc.). Since club nationals is a USATF only event, they do not have to follow IAAF rules for uniforms. Even national championships like road races do not have the same rules as they are only used for selection purposes and not direct qualifying.
Sadly, this is only a result of USATF having no balls. there is no way to enforce IAAF rules on uniforms in events that are not part of an IAAF Series, or more specifically a championship under their jurisdiction.
There are advertising limits at events like Millrose, but no uniform rules enforced (like these). This rule is also in direct vilation of the Stevens Act and USOC Bylaws which both prohibit restrictions on qualified athletes being able to compete. Restricting the ability to represent your sponsor &/or club will (in some cases) deny you the ability to train and compete, as money may be withheld for breach of a service contract.
The athletes need to get a court order stopping this crap for a violation of federal law and also for restriction of trade, as no one works for the USOC, they are all independent contractors vying for a prize based upon performance.