let me just respond to a few issues that have been raised for purposes of clarification...
all the following processes are seperate (and governed by different organizations)...
-medical school accred (AOA-COCA for osteo, LCME for allo)
-residency accred (AOA-COPT for osteo, ACGME for allo)
-residency application (ERAS for both - starting this year)
-residency match (AOA match for AOA programs, NRMP-SanFran-Urol-Military for ACGME programs)
-licensure (indiv. state medical boards - some of which are combined, some of which have seperate osteo and allo boards)
-board certification (one allo and one osteo for each specialty - ABIM / ABOIM)
-AOA "approval" of ACGME program training (via resolution 42 process)
the FL example given (which - by the way - this may seem theoretially plausable at first glance) addresses an issue that is seperate from the match issue (ie - it's an issue of licensure). the 4 states that *require* an AOA approved internship (just the first year) include FL, MI, WV, and PA (OK actually just requires DOs to complete a rotating internship - but it can be ACGME or AOA). one could argue that the requirements by these 4 states - in an innapropriate use of the purpose of licensure (ie - to protect the public). are the other 45 states endangering the public by not requiring DOs to complete osteo internships? of course not. but again - this is a seperate issue from the match
regarding whether or not AOA approval for ACGME training (via resolution 42) can make you elegible for licensure - i'm not sure. approval is not the same as accreditation, and i *think* that if you don't complete an AOA internship your first year - there is no way to get licensed in the states mentioned <i'm not sure about this - let me check>. i think "approval" does allow you to become board elegible through the osteo board organizations. let me check on this issue - and i'll re-post
hope this is not too confusing