# medically examined and certified as qualified to drive in such zone โ€” How long medical certificates last for pilots, commercial drivers and merchant mariners โ€” by class, age and service type For medically examined and certified as qualified to drive in such zone, occupation / regulator is commercial motor vehicle driver (FMCSA); age / service condition is Any driver authorized to operate a commercial motor vehicle only within an exempt intracity zone; operation / activity covered is operate a commercial motor vehicle only within an exempt intracity zone; valid for is 12 months; citation is 49 CFR 391.45, recorded from its source on 2026-08-11. - **Occupation / regulator:** commercial motor vehicle driver (FMCSA) _(our reading, not quoted from the source)_ - **Certificate and class:** medically examined and certified as qualified to drive in such zone _(verified: appears in the quote below)_ - **Age / service condition:** Any driver authorized to operate a commercial motor vehicle only within an exempt intracity zone _(verified: appears in the quote below)_ - **Operation / activity covered:** operate a commercial motor vehicle only within an exempt intracity zone _(verified: appears in the quote below)_ - **Valid for:** 12 months _(verified: appears in the quote below)_ - **Citation:** 49 CFR 391.45 _(verified: appears in the quote below)_ ## What the source says > ( c ) Any driver authorized to operate a commercial motor vehicle only within an exempt intracity zone pursuant to ยง 391.62 , if such driver has not been medically examined and certified as qualified to drive in such zone during the preceding 12 months; ## Source - https://www.ecfr.gov/current/title-49/subtitle-B/chapter-III/subchapter-B/part-391/subpart-E/section-391.45 Last verified: 2026-08-11. Review by: 2027-08-11. Part of [How long medical certificates last for pilots, commercial drivers and merchant mariners โ€” by class, age and service type](https://referencesource.org/medical-certificate-validity-by-occupation/).