Im not 100% sure at all but i will be training towards my aba level 1-3 starting in march and this is the info ive been told about it all so far which im not sure if you do need these first ABA 3 for a pro license but you could possibly, then i think i heared of somthing called contender which qualifies you for pro? non of this is 100% fact its just what ive recently been told about the courses in my area in the uk.