AUA is not the institution requiring both BLS and ACLS together one cannot do the one with out the other. If you do not have a BLS then you cannot take the ACLS. This is the reason. It is the ACLS certification that requires this. And the answer that you do not need the American Heart association card is not true. Most hospitals do not accept any other certification but the AHA certification. So do not be fooled and they require you to do the written as well as practical part of the courses.