Rule in our CCF (a lifetime ago, mind) was that you could wear the stable belt of your section once you'd passed some relevant test. E.g. us in the Royal Signals section had to have passed the Cadet Signals Classification Test. This made it something of a privilege, but not a randomly-awarded one. Still sounds like a good approach to me.
Other answer is of course "What does the corps/regiment to which the belt belongs think of the matter?"
Inevitably, as it's a self-purchased item, you'll get some with it and some without, which may upset those who like uniformity!
But I'm guessing you're not the contingent commander, and his/her decision is unlikely to be swayed by whatever any of us on here might say