In AHC we've been using cloth EMA belts. I go a size or two larger than for the usual tie. If folks want to wear leather ring belts then they pay for their own, but for the cloth belts the club covers the cost, which is just a few dollars each. As of right now we use green belts for those under 16 and brown for 16+. The difference in the material for each group has been eliminated so I was going to go to all brown, but the kids liked the green. The belts are then tied in the manner suggested by David Knight a while back. The principle difference now is that I expect those 16+ to be using steel as much as possible, while those 12-15 stick to synthetics.
Our ranks are a bit up in the air right now. I was going to use iron-on 1" stars to denote ranks on the belts. But being that we test so quickly on my current curricular envisioning I decided it might be best to think of it more in terms of how my old TKD instructor used to put tape on our belts to denote which elements of a test we were ready for. I'm still calling the level we're at now "Novice" with each star denoting that they have passed a test in which they had to demonstrate 5-7 techniques from each of the master cut sections of Ringeck (principally, not exclusively). I'm putting this curriculum together as I go, so it's fluid.
Besides that, wer're doing black pants and white shirt for the kids and similar form but freedom of color for the adults.
"Is this legal?"
"I dunno, it's fun though."