If there is signage, they don't enforce it. I've never been in a hot tub at the moderates without kids, sometimes even infants, in it. That includes later at night. I've had them in them at the quiet pools in the deluxe resorts as well but not as often or as many. My grown son and I were at CBR last March around 3 or 4 in the afternoon and there was barely room for us in the hot tub because there were so many kids in it splashing and jumping. We would have just left but we were there because he has permanent nerve damage in his spine and after walking around the parks in the morning, the hot water and jets feel good on his back. There was a pregnant woman with a baby still in diapers in it as well, which was probably not smart but not my business.