I would say the local Rep is ill informed.

If you don't have enough informaton at 'local level' you need to ask your rep for it, if that doesn't happen contact your national officer.
The DOH web site is full of information about it.

The problem is,I suspect, nobody knows which band they are going to be in.

You can view the national profiles on the DOH website.

It is all down to your job description. This must be up to date and contain information relevant to the sixteen critera. This includes how often you come into contact with body fluids, working conditions, how much responsibility you have, etc.

You will receive information about A4C with the ballot paper, read it make a judgement and decide.