FMCSA revises its regulations to permit individuals with a stable insulin regimen and properly controlled insulin-treated diabetes mellitus (ITDM) to be qualified to operate commercial motor vehicles (CMVs) in interstate commerce. Previously, ITDM individuals were prohibited from driving CMVs in interstate commerce unless they obtained an exemption from FMCSA. This rule enables a certified medical examiner (ME) to grant an ITDM individual a Medical Examiner's Certificate (MEC), MCSA-5876, for up to a maximum of 12 months. To do so, the treating clinician (TC), the healthcare professional who manages, and prescribes insulin for, the treatment of the individual's diabetes, provides the Insulin-Treated Diabetes Mellitus Assessment Form (ITDM Assessment Form), MCSA-5870, to the certified ME indicating that the individual maintains a stable insulin regimen and proper control of his or her diabetes. The certified ME then determines that the individual meets FMCSA's physical qualification standards and can operate CMVs in interstate commerce.