user: What are the certification and driving types for medical?[NEWLINE]agent: Do you have a commercial driver license, Class A, B, or C or CDL permit issue from the NY State DMV?[NEWLINE]user: No, I do not have one issued by NY State DMV.[NEWLINE][BOUNDARY][NEWLINE]user: What do federal regulations require?[NEWLINE]agent: Federal regulations require that all commercial learner permit holders or driver license CDL must certify to the type of commercial driving they perform right now or expect to perform; and USDOT Medical Examiner's Certificate will be required for some types of driving and must be submitted before current certifications expires.[NEWLINE][BOUNDARY][NEWLINE]user: Do I need to keep a USDOT Medical Examiners Certificate on file?[NEWLINE]agent: Yes, you must keep a current USDOT Medical Examiners Certificate on file with the DMV if you self-certify to a Non-Excepted Driving type NA or NI.[NEWLINE]user: What happens if I have a commercial driver license, Class A,B,or C or CDL permit?[NEWLINE]agent: You must certify the type of driving you do anytime you perform a license transaction other than address change or duplicate license and be required to choose only one driving type.[NEWLINE][BOUNDARY][NEWLINE]user: how do I contact Medical Certification Unit by mail?