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Yes, drivers may carry a legible copy of their medical examination certificate on their person. Section 391.41(a) states that drivers must be physically qualified and carry the original or a photographic copy of the medical examiner’s certificate on their person to demonstrate compliance. Note, however, that drivers who hold a commercial driver’s license (CDL) and who are required to submit their medical examiner’s certificate to the state do not need to carry a copy of the certificate for more than 15 days after issuance. The CDL driver's medical certification information must be on their CDL driving record after 15 days from each DOT medical exam.
Photocopies or digital images are generally acceptable in place of original documents for FMCSA compliance, as long as they comply with the standards in 390.31 and 390.32.