My AP is on my band, and I have only had problems with resorts - CBR and AKL. AKL insisted that I needed a new band as a room key. I politely argued that I did not, that all I had to do is put the room key code on my band, and they did it. I had to be a little persistent, and told them that they could recycle the grey band that they had for me. At CBR, they really wanted me to use the yellow band that mom had made for me. I was kinda ticked off, since I am trying to keep MB consumption low. The main problem was that my Mom talked to the front desk instead of me, and she isn't very good at well...being bullheaded me!
So - as a ticket, no worries. As a room key, my current MB isn't always accepted and you may have to argue (?) your point a bit.