Basically the passing criteria, that the CFAI has stated is determined as 70% of the top 1%, by comittee and there is one more method I can't remember. Basically since nobody has ever passed a CFA exam with 100% (CFAI statement), they have stated you can get 0 on one section on the exam and still pass and the 40/60/80 method of test results usally indicate a pass mark of less than 70%, 70% is a good target to get a pass.