In a perfect world, sure. But, I think enforcing this or choosing what fish are included in this group to be special ordered can get dicey. So if potential buyers would need to show evidence of a 3000 gallon minimum for an RTC, then what next. 1500 plus gallon for a peacock bass (they get huge and are much for active swimmers than RTC). What about Dovii - 1000 gallon minimum...they get 24 inches+. Rays - should they be banned altogether and left for public aquariums. What I'm trying to say, once you start regulating what fish we can keep more than it is already being regulated, unintended consequences can occur for a whole lot of fish besides the RTC we started with. To quote Marc Cuban "It can become a slippery slope"