If you haven't notified the airport operator you can't fly above 400 feet. This has nothing to do with whether there's a club rule. This much of the rule seems very clear.

If you have notified the airport operator, it gets a less clear. Do you need to get the airport operator's permission to fly higher than 400 feet? Do you have to notify them about each over-400-foot flight, or is telling them you plan to fly higher than 400 feet on Saturdays during the summer enough? The rule is ambiguous about these things. You aren't going to resolve these questions by looking at the language of the rule.

Quite apart from what the rule says or doesn't say, common sense has a lot to do with how you fly in the vicinity of full scale aircraft.

Nothing in the AMA rule says anything about controlled airspace, one way or the other.