Join the Hoosier Appaloosa Association! Download and submit our membership application by clicking on the link below. Memberships are issued on a calendar year basis so you will need to renew each year. You do not have to be a member of the Appaloosa Horse Club (ApHC) to be a member of HAA, but we do recommend this if you are competing for national points or to qualify for the Appaloosa World Championship show.