gun plumber, i dont htink you need a chit for that. In my unit they allow people to use the 64, some incourage it. Its a strong frame compared to the wire frame of our 82. IT also focuses the heavy wait on the upper back the way it should of been. Im sure you have hear this already. But with my experience so far, you do not need a chit, but ask your sec 2ic or someone on those lines if you can use it.