I believe that a 4-year degree reflects the type of maturity and scholarship that should be present for a viable medical, osteopathic or chiropractic school student.   Perhaps, in the past, just taking core classes was enough pre-requisite, but the changing face of college studies needs to be taken into concern here.  To overcome objection to this requirement, a consideration for enough hours in qualifying subjects can also be written into the code.   This does seem redundant, but may help someone who has been forced by circumstances to transfer to different colleges and universities at the undergraduate level, yet has more than enough credits to merit a degree.  The amount of maturity and ability to complete courses is the primary concern.