Is a team defined by its legal entity or also the people composing it? For instance if the brit enter the F50 circuit under Team Ineos (without UK), have a specific technical team separate from AC but still use the same sailors.
I don't see how this would break the rule. It really feels like that rule is more for dissuasion than anything else.
On another note since F50 will basically be one design it won't learn AC teams a lot on a platform they know pretty well already. And I don't think any AC team will be tempted by F50 circuit, it risks to divert from the main effort and you file in a team composed from AC sailors, the expectation would be that they crush the competition since they should know how to sail those boats. Anything but wins will hurt their reputation.
I don't see how this would break the rule. It really feels like that rule is more for dissuasion than anything else.
On another note since F50 will basically be one design it won't learn AC teams a lot on a platform they know pretty well already. And I don't think any AC team will be tempted by F50 circuit, it risks to divert from the main effort and you file in a team composed from AC sailors, the expectation would be that they crush the competition since they should know how to sail those boats. Anything but wins will hurt their reputation.