Which certification is easier to keep up Indiana State or National Registry? Which would be the easier exam to take? I already know which one is cheaper states only $15 vs. $125 for national. I live on the Indiana & Kentucky border. Out of the 5 local services AMR is the only one that requires National. I probable won`t be working in EMS till I finish Medic School that starts in the fall. Reason, behind this finding a job that pays better than EMT-B. Wouldn`t be able to do the job without the EMT-B class, & being a hospital tech. I`m doing an ambulance intership, hey it helps my GPA ^^.