@ the end of the day you have signed a CONTRACT with the NCCA with all its T&Cs, and, as with most of these types of organisation's, you and they are run by the T&Cs, of the CONTRACT, its the only way that they can be run with so many members.
I have had some experience with these types of contracts and organisations within the photographic industry, and its the same , you have to follow the T&Cs to the letter to get out of them, once they get their hooks into you they do not want to let you ( and your money ) leave.
You must read ALL T&Cs, and understand them, before you sign anything ! That is the view of all judges etc , if you signed it , you understood the contract, or you took advice and understood the advice before signing.