The SCAA is the Society for Creative Anachronism (Incorporated in South Australia), aka SCA Australia. Australian members of the SCA are actually members of the SCAA as it has the rights and privileges of being an Australia body, set up according to Australia laws.
Just because you are a citizen of the Kingdom of Lochac and an SCA member does not mean that you are a SCAA member. You could be a New Zealander which has its own SCANZ!
The SCAA has its own range of officers according to its constitution. As for the membership, these offices are not linked to offices in Lochac.