Nope, that's within the rules. As long as it's even partially full of water (Paludarium) you can enter it. As a joke I've often thought of 'scaping a tank with emersed aquarium species and sending it in dry.
Hooked up the humidifier today. I was worried that the heat from the humidifier would be to hot, but its actually perfect at 74F. So I no longer need the heater. I set it to go off for ten minutes, every two hours, every day. I'm testing it out on the small tank, and then eventually I am going to move every thing to a 45 gallon. If you were to do this for a paludarium, you would use a cold humidifier for effects. A trick the Senske's mentioned was to spray the front glass with R/O water so that you don't get condensation on the glass, and can view the aquascape.