Adam, I am not aware of any rules stating swim diapers cannot be used at those locations. As long as the swim diaper fits appropriately and does what it's supposed to do, I can't see any reason why you might be questioned or run into an issue. Most likely, others will not even notice what you are wearing under your swim suit.
Well, then, there you have your answer. They apparently do have a rule. Thank you for sharing that info.
Maybe you can use the pools and get out at regular intervals to use the rest room. I'm thinking every 30 minutes or something like that. We never spend much more than an hour at any one time anyway. That's at the resort pools; we haven't done a water park in many years.
Adam, did you ask if adult diapers are allowed in the water or adult swim diapers. There is a big difference. I don't think they could legally prevent the use of adult swim diapers or else they would have to not allow baby swim diapers and those are clearly allowed.
There is a big difference between adult diapers and adult swim diapers.
Adult diapers are meant to be absorbent and absorb liquid. They will absorb water from the swimming pool and become very heavy as they fill with water.
Once they become wet, they will not contain feces.
The main purpose of adult swim diapers us containing feces (stool). They won't contain urine. They won't absorb water or urine.
Is this something new? Because when my DD was little we never ran into a situation where baby swim diapers weren't allowed. I know they aren't permitted in the pools on cruise ships, but they were permitted in pools both in our hometown and at WDW.