Every show I've been to require a numbered leg band. These shows were in Oklohoma, Arkansas and Louisiana. And yes I've been to a few 4-H and State Fair shows. I'm sure its the club "hosting" the show that wants the bands. Sooooo, I need a numbered leg band to show birds.Neither the APA or the ABA require leg bands for exhibition in their sanctioned shows.
I'm not sure what show you're referencing that requires bands but it must be a local show requirement. Do you show at a Fair or in a 4H type show>