{ "name": "How long medical certificates last for pilots, commercial drivers and merchant mariners \u2014 by class, age and service type", "description": "How long a federally required medical certificate remains valid for each regulated transport occupation, and what it depends on. FAA pilot medicals (14 CFR 61.23) cascade by class and age \u2014 a first-class certificate carries first-class privileges to the 12th month for pilots under 40 but only the 6th month at 40 or older, then downgrades to second- and third-class privileges on a schedule; commercial drivers need a medical examiner's certificate on a cycle set by 49 CFR 391.45; merchant mariner medical certificates run 2 years for STCW service but 5 years for national-only credentials, and only 1 year for mariners under 18 (46 CFR 10.301). Same question \u2014 'how long is my medical good for?' \u2014 three regulators, three completely different answer structures. Answers 'how long is a first class medical valid for a 45-year-old pilot?', 'how often does a truck driver need a DOT physical?', 'why is my mariner medical certificate only valid two years?'", "url": "https://referencesource.org/medical-certificate-validity-by-occupation/", "licence": "All sources are eCFR (US government work, public domain). We take facts plus short attributed quotes linking back.", "last_verified": "2026-08-11", "stale_after": "2027-08-11", "sources": [ "https://www.ecfr.gov/current/title-14/chapter-I/subchapter-D/part-61/subpart-A/section-61.23", "https://www.ecfr.gov/current/title-46/chapter-I/subchapter-B/part-10/subpart-C/section-10.301", "https://www.ecfr.gov/current/title-49/subtitle-B/chapter-III/subchapter-B/part-391/subpart-E/section-391.45" ], "records": [ { "occupation": "pilot (FAA)", "credential": "first-class medical certificate", "condition": "Any age", "operation": "a commercial pilot certificate (other than a commercial pilot certificate with a balloon rating when conducting flight training), a flight engineer certificate, or an air traffic control tower operator certificate", "validity_period": "12th month after the month of the date of examination shown on the medical certificate", "citation": "14 CFR 61.23", "id": "a-commercial-pilot-certificate-other-than-a-commercial-pilot-certificate-with-a--any-age-first-class-medical-certificate", "url": "https://referencesource.org/medical-certificate-validity-by-occupation/a-commercial-pilot-certificate-other-than-a-commercial-pilot-certificate-with-a--any-age-first-class-medical-certificate/", "source": "https://www.ecfr.gov/current/title-14/chapter-I/subchapter-D/part-61/subpart-A/section-61.23", "source_quote": "(1) A first-class medical certificate | (i) Under age 40 | an airline transport pilot certificate for pilot-in-command privileges, or for second-in-command privileges in a flag or supplemental operation in part 121 requiring three or more pilots | 12th month after the month of the date of examination shown on the medical certificate. | | (ii) Age 40 or older | an airline transport pilot certificate for pilot-in-command privileges, for second-in-command privileges in a flag or supplemental operation in part 121 requiring three or more pilots, or for a pilot flightcrew member in part 121 operations who has reached his or her 60th birthday. | 6th month after the month of the date of examination shown on the medical certificate. | | (iii) Any age | a commercial pilot certificate (other than a commercial pilot certificate with a balloon rating when conducting flight training), a flight engineer certificate, or an air traffic control tower operator certificate | 12th month after the month of the date of examination shown on the medical certificate.", "verified_fields": [ "citation", "condition", "credential", "operation", "validity_period" ], "derived_fields": [ "occupation" ] }, { "occupation": "pilot (FAA)", "credential": "first-class medical certificate", "condition": "Age 40 or older", "operation": "a recreational pilot certificate, a private pilot certificate, a flight instructor certificate (when acting as pilot in command or a required pilot flight crewmember in operations other than glider or balloon), a student pilot certificate, or a sport pilot certificate (when not using a U.S. driver's license as medical qualification)", "validity_period": "24th month after the month of the date of examination shown on the medical certificate", "citation": "14 CFR 61.23", "id": "a-recreational-pilot-certificate-a-private-pilot-certificate-a-flight-instructor-age-40-or-older-first-class-medical-certificate", "url": "https://referencesource.org/medical-certificate-validity-by-occupation/a-recreational-pilot-certificate-a-private-pilot-certificate-a-flight-instructor-age-40-or-older-first-class-medical-certificate/", "source": "https://www.ecfr.gov/current/title-14/chapter-I/subchapter-D/part-61/subpart-A/section-61.23", "source_quote": "(1) A first-class medical certificate | (i) Under age 40 | an airline transport pilot certificate for pilot-in-command privileges, or for second-in-command privileges in a flag or supplemental operation in part 121 requiring three or more pilots | 12th month after the month of the date of examination shown on the medical certificate. | | (ii) Age 40 or older | an airline transport pilot certificate for pilot-in-command privileges, for second-in-command privileges in a flag or supplemental operation in part 121 requiring three or more pilots, or for a pilot flightcrew member in part 121 operations who has reached his or her 60th birthday. | 6th month after the month of the date of examination shown on the medical certificate. | | (iii) Any age | a commercial pilot certificate (other than a commercial pilot certificate with a balloon rating when conducting flight training), a flight engineer certificate, or an air traffic control tower operator certificate | 12th month after the month of the date of examination shown on the medical certificate. | | (iv) Under age 40 | a recreational pilot certificate, a private pilot certificate, a flight instructor certificate (when acting as pilot in command or a required pilot flight crewmember in operations other than glider or balloon), a student pilot certificate, or a sport pilot certificate (when not using a U.S. driver's license as medical qualification) | 60th month after the month of the date of examination shown on the medical certificate. | | (v) Age 40 or older | a recreational pilot certificate, a private pilot certificate, a flight instructor certificate (when acting as pilot in command or a required pilot flight crewmember in operations other than glider or balloon), a student pilot certificate, or a sport pilot certificate (when not using a U.S. driver's license as medical qualification) | 24th month after the month of the date of examination shown on the medical certificate.", "verified_fields": [ "citation", "condition", "credential", "operation", "validity_period" ], "derived_fields": [ "occupation" ] }, { "occupation": "pilot (FAA)", "credential": "second-class medical certificate", "condition": "Age 40 or older", "operation": "a recreational pilot certificate, a private pilot certificate, a flight instructor certificate (when acting as pilot in command or a required pilot flight crewmember in operations other than glider or balloon), a student pilot certificate, or a sport pilot certificate (when not using a U.S. driver's license as medical qualification)", "validity_period": "24th month after the month of the date of examination shown on the medical certificate", "citation": "14 CFR 61.23", "id": "a-recreational-pilot-certificate-a-private-pilot-certificate-a-flight-instructor-age-40-or-older-second-class-medical-certificate", "url": "https://referencesource.org/medical-certificate-validity-by-occupation/a-recreational-pilot-certificate-a-private-pilot-certificate-a-flight-instructor-age-40-or-older-second-class-medical-certificate/", "source": "https://www.ecfr.gov/current/title-14/chapter-I/subchapter-D/part-61/subpart-A/section-61.23", "source_quote": "(2) A second-class medical certificate | (i) Any age | an airline transport pilot certificate for second-in-command privileges (other than the operations specified in paragraph (d)(1) of this section), a commercial pilot certificate (other than a commercial pilot certificate with a balloon rating when conducting flight training), a flight engineer certificate, or an air traffic control tower operator certificate | 12th month after the month of the date of examination shown on the medical certificate. | | (ii) Under age 40 | a recreational pilot certificate, a private pilot certificate, a flight instructor certificate (when acting as pilot in command or a required pilot flight crewmember in operations other than glider or balloon), a student pilot certificate, or a sport pilot certificate (when not using a U.S. driver's license as medical qualification) | 60th month after the month of the date of examination shown on the medical certificate. | | (iii) Age 40 or older | a recreational pilot certificate, a private pilot certificate, a flight instructor certificate (when acting as pilot in command or a required pilot flight crewmember in operations other than glider or balloon), a student pilot certificate, or a sport pilot certificate (when not using a U.S. driver's license as medical qualification) | 24th month after the month of the date of examination shown on the medical certificate.", "verified_fields": [ "citation", "condition", "credential", "operation", "validity_period" ], "derived_fields": [ "occupation" ] }, { "occupation": "pilot (FAA)", "credential": "third-class medical certificate", "condition": "Age 40 or older", "operation": "a recreational pilot certificate, a private pilot certificate, a flight instructor certificate (when acting as pilot in command or a required pilot flight crewmember in operations other than glider or balloon), a student pilot certificate, or a sport pilot certificate (when not using a U.S. driver's license as medical qualification)", "validity_period": "24th month after the month of the date of examination shown on the medical certificate", "citation": "14 CFR 61.23", "id": "a-recreational-pilot-certificate-a-private-pilot-certificate-a-flight-instructor-age-40-or-older-third-class-medical-certificate", "url": "https://referencesource.org/medical-certificate-validity-by-occupation/a-recreational-pilot-certificate-a-private-pilot-certificate-a-flight-instructor-age-40-or-older-third-class-medical-certificate/", "source": "https://www.ecfr.gov/current/title-14/chapter-I/subchapter-D/part-61/subpart-A/section-61.23", "source_quote": "(3) A third-class medical certificate | (i) Under age 40 | a recreational pilot certificate, a private pilot certificate, a flight instructor certificate (when acting as pilot in command or a required pilot flight crewmember in operations other than glider or balloon), a student pilot certificate, or a sport pilot certificate (when not using a U.S. driver's license as medical qualification) | 60th month after the month of the date of examination shown on the medical certificate. | | (ii) Age 40 or older | a recreational pilot certificate, a private pilot certificate, a flight instructor certificate (when acting as pilot in command or a required pilot flight crewmember in operations other than glider or balloon), a student pilot certificate, or a sport pilot certificate (when not using a U.S. driver's license as medical qualification) | 24th month after the month of the date of examination shown on the medical certificate.", "verified_fields": [ "citation", "condition", "credential", "operation", "validity_period" ], "derived_fields": [ "occupation" ] }, { "occupation": "pilot (FAA)", "credential": "first-class medical certificate", "condition": "Under age 40", "operation": "a recreational pilot certificate, a private pilot certificate, a flight instructor certificate (when acting as pilot in command or a required pilot flight crewmember in operations other than glider or balloon), a student pilot certificate, or a sport pilot certificate (when not using a U.S. driver's license as medical qualification)", "validity_period": "60th month after the month of the date of examination shown on the medical certificate", "citation": "14 CFR 61.23", "id": "a-recreational-pilot-certificate-a-private-pilot-certificate-a-flight-instructor-under-age-40-first-class-medical-certificate", "url": "https://referencesource.org/medical-certificate-validity-by-occupation/a-recreational-pilot-certificate-a-private-pilot-certificate-a-flight-instructor-under-age-40-first-class-medical-certificate/", "source": "https://www.ecfr.gov/current/title-14/chapter-I/subchapter-D/part-61/subpart-A/section-61.23", "source_quote": "(1) A first-class medical certificate | (i) Under age 40 | an airline transport pilot certificate for pilot-in-command privileges, or for second-in-command privileges in a flag or supplemental operation in part 121 requiring three or more pilots | 12th month after the month of the date of examination shown on the medical certificate. | | (ii) Age 40 or older | an airline transport pilot certificate for pilot-in-command privileges, for second-in-command privileges in a flag or supplemental operation in part 121 requiring three or more pilots, or for a pilot flightcrew member in part 121 operations who has reached his or her 60th birthday. | 6th month after the month of the date of examination shown on the medical certificate. | | (iii) Any age | a commercial pilot certificate (other than a commercial pilot certificate with a balloon rating when conducting flight training), a flight engineer certificate, or an air traffic control tower operator certificate | 12th month after the month of the date of examination shown on the medical certificate. | | (iv) Under age 40 | a recreational pilot certificate, a private pilot certificate, a flight instructor certificate (when acting as pilot in command or a required pilot flight crewmember in operations other than glider or balloon), a student pilot certificate, or a sport pilot certificate (when not using a U.S. driver's license as medical qualification) | 60th month after the month of the date of examination shown on the medical certificate.", "verified_fields": [ "citation", "condition", "credential", "operation", "validity_period" ], "derived_fields": [ "occupation" ] }, { "occupation": "pilot (FAA)", "credential": "second-class medical certificate", "condition": "Under age 40", "operation": "a recreational pilot certificate, a private pilot certificate, a flight instructor certificate (when acting as pilot in command or a required pilot flight crewmember in operations other than glider or balloon), a student pilot certificate, or a sport pilot certificate (when not using a U.S. driver's license as medical qualification)", "validity_period": "60th month after the month of the date of examination shown on the medical certificate", "citation": "14 CFR 61.23", "id": "a-recreational-pilot-certificate-a-private-pilot-certificate-a-flight-instructor-under-age-40-second-class-medical-certificate", "url": "https://referencesource.org/medical-certificate-validity-by-occupation/a-recreational-pilot-certificate-a-private-pilot-certificate-a-flight-instructor-under-age-40-second-class-medical-certificate/", "source": "https://www.ecfr.gov/current/title-14/chapter-I/subchapter-D/part-61/subpart-A/section-61.23", "source_quote": "(2) A second-class medical certificate | (i) Any age | an airline transport pilot certificate for second-in-command privileges (other than the operations specified in paragraph (d)(1) of this section), a commercial pilot certificate (other than a commercial pilot certificate with a balloon rating when conducting flight training), a flight engineer certificate, or an air traffic control tower operator certificate | 12th month after the month of the date of examination shown on the medical certificate. | | (ii) Under age 40 | a recreational pilot certificate, a private pilot certificate, a flight instructor certificate (when acting as pilot in command or a required pilot flight crewmember in operations other than glider or balloon), a student pilot certificate, or a sport pilot certificate (when not using a U.S. driver's license as medical qualification) | 60th month after the month of the date of examination shown on the medical certificate.", "verified_fields": [ "citation", "condition", "credential", "operation", "validity_period" ], "derived_fields": [ "occupation" ] }, { "occupation": "pilot (FAA)", "credential": "third-class medical certificate", "condition": "Under age 40", "operation": "a recreational pilot certificate, a private pilot certificate, a flight instructor certificate (when acting as pilot in command or a required pilot flight crewmember in operations other than glider or balloon), a student pilot certificate, or a sport pilot certificate (when not using a U.S. driver's license as medical qualification)", "validity_period": "60th month after the month of the date of examination shown on the medical certificate", "citation": "14 CFR 61.23", "id": "a-recreational-pilot-certificate-a-private-pilot-certificate-a-flight-instructor-under-age-40-third-class-medical-certificate", "url": "https://referencesource.org/medical-certificate-validity-by-occupation/a-recreational-pilot-certificate-a-private-pilot-certificate-a-flight-instructor-under-age-40-third-class-medical-certificate/", "source": "https://www.ecfr.gov/current/title-14/chapter-I/subchapter-D/part-61/subpart-A/section-61.23", "source_quote": "(3) A third-class medical certificate | (i) Under age 40 | a recreational pilot certificate, a private pilot certificate, a flight instructor certificate (when acting as pilot in command or a required pilot flight crewmember in operations other than glider or balloon), a student pilot certificate, or a sport pilot certificate (when not using a U.S. driver's license as medical qualification) | 60th month after the month of the date of examination shown on the medical certificate.", "verified_fields": [ "citation", "condition", "credential", "operation", "validity_period" ], "derived_fields": [ "occupation" ] }, { "occupation": "merchant mariner (US Coast Guard)", "credential": "medical certificate", "condition": "all other mariners", "validity_period": "5 years", "citation": "46 CFR 10.301", "id": "all-other-mariners-medical-certificate", "url": "https://referencesource.org/medical-certificate-validity-by-occupation/all-other-mariners-medical-certificate/", "source": "https://www.ecfr.gov/current/title-46/chapter-I/subchapter-B/part-10/subpart-C/section-10.301", "source_quote": "( 2 ) Medical certificates issued to all other mariners will be issued for a maximum period of 5 years.", "verified_fields": [ "citation", "condition", "credential", "validity_period" ], "derived_fields": [ "occupation" ] }, { "occupation": "pilot (FAA)", "credential": "first-class medical certificate", "condition": "Age 40 or older", "operation": "an airline transport pilot certificate for pilot-in-command privileges, for second-in-command privileges in a flag or supplemental operation in part 121 requiring three or more pilots, or for a pilot flightcrew member in part 121 operations who has reached his or her 60th birthday", "validity_period": "6th month after the month of the date of examination shown on the medical certificate", "citation": "14 CFR 61.23", "id": "an-airline-transport-pilot-certificate-for-pilot-in-command-privileges-for-secon-age-40-or-older-first-class-medical-certificate", "url": "https://referencesource.org/medical-certificate-validity-by-occupation/an-airline-transport-pilot-certificate-for-pilot-in-command-privileges-for-secon-age-40-or-older-first-class-medical-certificate/", "source": "https://www.ecfr.gov/current/title-14/chapter-I/subchapter-D/part-61/subpart-A/section-61.23", "source_quote": "(1) A first-class medical certificate | (i) Under age 40 | an airline transport pilot certificate for pilot-in-command privileges, or for second-in-command privileges in a flag or supplemental operation in part 121 requiring three or more pilots | 12th month after the month of the date of examination shown on the medical certificate. | | (ii) Age 40 or older | an airline transport pilot certificate for pilot-in-command privileges, for second-in-command privileges in a flag or supplemental operation in part 121 requiring three or more pilots, or for a pilot flightcrew member in part 121 operations who has reached his or her 60th birthday. | 6th month after the month of the date of examination shown on the medical certificate.", "verified_fields": [ "citation", "condition", "credential", "operation", "validity_period" ], "derived_fields": [ "occupation" ] }, { "occupation": "pilot (FAA)", "credential": "first-class medical certificate", "condition": "Under age 40", "operation": "an airline transport pilot certificate for pilot-in-command privileges, or for second-in-command privileges in a flag or supplemental operation in part 121 requiring three or more pilots", "validity_period": "12th month after the month of the date of examination shown on the medical certificate", "citation": "14 CFR 61.23", "id": "an-airline-transport-pilot-certificate-for-pilot-in-command-privileges-or-for-se-under-age-40-first-class-medical-certificate", "url": "https://referencesource.org/medical-certificate-validity-by-occupation/an-airline-transport-pilot-certificate-for-pilot-in-command-privileges-or-for-se-under-age-40-first-class-medical-certificate/", "source": "https://www.ecfr.gov/current/title-14/chapter-I/subchapter-D/part-61/subpart-A/section-61.23", "source_quote": "(1) A first-class medical certificate | (i) Under age 40 | an airline transport pilot certificate for pilot-in-command privileges, or for second-in-command privileges in a flag or supplemental operation in part 121 requiring three or more pilots | 12th month after the month of the date of examination shown on the medical certificate.", "verified_fields": [ "citation", "condition", "credential", "operation", "validity_period" ], "derived_fields": [ "occupation" ] }, { "occupation": "pilot (FAA)", "credential": "second-class medical certificate", "condition": "Any age", "operation": "an airline transport pilot certificate for second-in-command privileges", "validity_period": "12th month after the month of the date of examination shown on the medical certificate", "citation": "14 CFR 61.23", "id": "an-airline-transport-pilot-certificate-for-second-in-command-privileges-any-age-second-class-medical-certificate", "url": "https://referencesource.org/medical-certificate-validity-by-occupation/an-airline-transport-pilot-certificate-for-second-in-command-privileges-any-age-second-class-medical-certificate/", "source": "https://www.ecfr.gov/current/title-14/chapter-I/subchapter-D/part-61/subpart-A/section-61.23", "source_quote": "(2) A second-class medical certificate | (i) Any age | an airline transport pilot certificate for second-in-command privileges (other than the operations specified in paragraph (d)(1) of this section), a commercial pilot certificate (other than a commercial pilot certificate with a balloon rating when conducting flight training), a flight engineer certificate, or an air traffic control tower operator certificate | 12th month after the month of the date of examination shown on the medical certificate.", "verified_fields": [ "citation", "condition", "credential", "operation", "validity_period" ], "derived_fields": [ "occupation" ] }, { "occupation": "commercial motor vehicle driver (FMCSA)", "credential": "medical examiner's certificate", "condition": "Any driver who does not satisfy, with the worse eye, either the distant visual acuity standard with corrective lenses or the field of vision standard, or both", "validity_period": "12 months", "citation": "49 CFR 391.45", "id": "any-driver-who-does-not-satisfy-with-the-worse-eye-either-the-distant-visual-acu-medical-examiner-s-certificate", "url": "https://referencesource.org/medical-certificate-validity-by-occupation/any-driver-who-does-not-satisfy-with-the-worse-eye-either-the-distant-visual-acu-medical-examiner-s-certificate/", "source": "https://www.ecfr.gov/current/title-49/subtitle-B/chapter-III/subchapter-B/part-391/subpart-E/section-391.45", "source_quote": "( f ) Any driver who does not satisfy, with the worse eye, either the distant visual acuity standard with corrective lenses or the field of vision standard, or both, in \u00a7 391.41(b)(10)(i) and who has obtained a medical examiner's certificate under the standards in \u00a7 391.44 , if such driver's most recent medical examination and certification as qualified to drive did not occur during the preceding 12 months;", "verified_fields": [ "citation", "condition", "credential", "validity_period" ], "derived_fields": [ "occupation" ] }, { "occupation": "commercial motor vehicle driver (FMCSA)", "credential": "medical examiner's certificate", "condition": "Any driver who has diabetes mellitus treated with insulin for control", "validity_period": "12 months", "citation": "49 CFR 391.45", "id": "any-driver-who-has-diabetes-mellitus-treated-with-insulin-for-control-medical-examiner-s-certificate", "url": "https://referencesource.org/medical-certificate-validity-by-occupation/any-driver-who-has-diabetes-mellitus-treated-with-insulin-for-control-medical-examiner-s-certificate/", "source": "https://www.ecfr.gov/current/title-49/subtitle-B/chapter-III/subchapter-B/part-391/subpart-E/section-391.45", "source_quote": "( e ) Any driver who has diabetes mellitus treated with insulin for control and who has obtained a medical examiner's certificate under the standards in \u00a7 391.46 , if such driver's most recent medical examination and certification as qualified to drive did not occur during the preceding 12 months;", "verified_fields": [ "citation", "condition", "credential", "validity_period" ], "derived_fields": [ "occupation" ] }, { "occupation": "commercial motor vehicle driver (FMCSA)", "credential": "medically examined and certified as qualified to operate a commercial motor vehicle", "condition": "Any driver who has not been medically examined and certified as qualified to operate a commercial motor vehicle during the preceding 24 months", "validity_period": "24 months", "citation": "49 CFR 391.45", "id": "any-driver-who-has-not-been-medically-examined-and-certified-as-qualified-to-ope-medically-examined-and-certified-as-qualified-to-operate-a-commercial-motor-vehi", "url": "https://referencesource.org/medical-certificate-validity-by-occupation/any-driver-who-has-not-been-medically-examined-and-certified-as-qualified-to-ope-medically-examined-and-certified-as-qualified-to-operate-a-commercial-motor-vehi/", "source": "https://www.ecfr.gov/current/title-49/subtitle-B/chapter-III/subchapter-B/part-391/subpart-E/section-391.45", "source_quote": "( b ) Any driver who has not been medically examined and certified as qualified to operate a commercial motor vehicle during the preceding 24 months,", "verified_fields": [ "citation", "condition", "credential", "validity_period" ], "derived_fields": [ "occupation" ] }, { "occupation": "merchant mariner (US Coast Guard)", "credential": "medical certificate", "condition": "All persons employed or engaged onboard vessels to which STCW applies", "operation": "onboard vessels to which STCW applies", "validity_period": "valid for 2 years", "citation": "46 CFR 10.301", "id": "onboard-vessels-to-which-stcw-applies-all-persons-employed-or-engaged-onboard-vessels-to-which-stcw-applies-medical-certificate", "url": "https://referencesource.org/medical-certificate-validity-by-occupation/onboard-vessels-to-which-stcw-applies-all-persons-employed-or-engaged-onboard-vessels-to-which-stcw-applies-medical-certificate/", "source": "https://www.ecfr.gov/current/title-46/chapter-I/subchapter-B/part-10/subpart-C/section-10.301", "source_quote": "( 1 ) All persons employed or engaged onboard vessels to which STCW applies will be issued a medical certificate valid for 2 years unless the mariner is under the age of 18, in which case the maximum period of validity will be 1 year.", "verified_fields": [ "citation", "condition", "credential", "operation", "validity_period" ], "derived_fields": [ "occupation" ] }, { "occupation": "merchant mariner (US Coast Guard)", "credential": "medical certificate", "condition": "the mariner is under the age of 18", "operation": "onboard vessels to which STCW applies", "validity_period": "1 year", "citation": "46 CFR 10.301", "id": "onboard-vessels-to-which-stcw-applies-the-mariner-is-under-the-age-of-18-medical-certificate", "url": "https://referencesource.org/medical-certificate-validity-by-occupation/onboard-vessels-to-which-stcw-applies-the-mariner-is-under-the-age-of-18-medical-certificate/", "source": "https://www.ecfr.gov/current/title-46/chapter-I/subchapter-B/part-10/subpart-C/section-10.301", "source_quote": "( 1 ) All persons employed or engaged onboard vessels to which STCW applies will be issued a medical certificate valid for 2 years unless the mariner is under the age of 18, in which case the maximum period of validity will be 1 year.", "verified_fields": [ "citation", "condition", "credential", "operation", "validity_period" ], "derived_fields": [ "occupation" ] }, { "occupation": "commercial motor vehicle driver (FMCSA)", "credential": "medically examined and certified as qualified to drive in such zone", "condition": "Any driver authorized to operate a commercial motor vehicle only within an exempt intracity zone", "operation": "operate a commercial motor vehicle only within an exempt intracity zone", "validity_period": "12 months", "citation": "49 CFR 391.45", "id": "operate-a-commercial-motor-vehicle-only-within-an-exempt-intracity-zone-any-driver-authorized-to-operate-a-commercial-motor-vehicle-only-within-an-exemp-medically-examined-and-certified-as-qualified-to-drive-in-such-zone", "url": "https://referencesource.org/medical-certificate-validity-by-occupation/operate-a-commercial-motor-vehicle-only-within-an-exempt-intracity-zone-any-driver-authorized-to-operate-a-commercial-motor-vehicle-only-within-an-exemp-medically-examined-and-certified-as-qualified-to-drive-in-such-zone/", "source": "https://www.ecfr.gov/current/title-49/subtitle-B/chapter-III/subchapter-B/part-391/subpart-E/section-391.45", "source_quote": "( c ) Any driver authorized to operate a commercial motor vehicle only within an exempt intracity zone pursuant to \u00a7 391.62 , if such driver has not been medically examined and certified as qualified to drive in such zone during the preceding 12 months;", "verified_fields": [ "citation", "condition", "credential", "operation", "validity_period" ], "derived_fields": [ "occupation" ] } ] }