fencer
NES Member
I know I'm not a lawyer (just a pedant at best) but that seems like a really dangerous trap on their end if they don't provide the definition in writing. I would think it possible to argue that without a complete, written definition that can be referenced at the time, your signature was under duress (Hobson's choice: sign despite being uninformed, or throw away your investment and effectively rescind your RKBA). Even with activist judges, I'd think being strong armed by your chief of police is a no-no.
I think that you would have a hard time getting a judge in Mass to agree with you, even though most of us would.