Princess kids program and potty trained policy?

Hello

We are soon to be leaving on a Princess cruise with our kids. Our youngest is 3 and is in the process of being potty trained. Does anyone know whether a child must be potty trained to participate in the onboard 'ship school' activities (for this age group)? (FYI, he wears pull-ups and/ or diapers to catch any accidents...)

If you know of any existing threads (I couldn't find one on a quick search), please let me know and I appreciate your time.

Under Age Requirements/Traveling with Children -Youth Programs - Additional Reminders states that the staff will not change diapers/pull-ups etc. Children need to be potty trained.

https://www.princess.com/learn/faq_answer/pre_cruise/before.jsp

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Children must also be 100% potty trained to be in any of the pools. No swim diapers.