You can get a AASA log book by filling out a form then posting,email or fax to the AASA office. There is a few people around who will come to your place to inspect the car and sign off the paperwork if required. This can be done for both AASA and CAMS.
Its a easy process to complete.
License for both AASA National (this is what I have used since 2007)and CAMS requires someone to sign off to say you are competent. This too is quite easy to perform. Driver trainers can sign off along with the Clerk of the course at a given event.
The concept of two races is just that. A concept that is being entertained.