Datasets:

referencesource
/

cdl-endorsement-prerequisites

clp_eligible string	derived_fields list	endorsement string	id string	source string	source_quote string	test_required string	url string	verified_fields list	also_reported list	disagreements list
No — a CLP may carry only the Passenger, School bus and Tank vehicle endorsements, and this is not one of them	[ "clp_eligible" ]	Double/Triple Trailers	double-triple-trailers	https://www.ecfr.gov/current/title-49/section-383.93	The only endorsements allowed on a CLP are the following: ( i ) Passenger (P); ( ii ) School bus (S); and ( iii ) Tank vehicle (N). ( 3 ) The State must use the codes listed in <https://www.ecfr.gov/current/title-49/section-383.153> § 383.153 when placing endorsements on a CLP or CDL. ( b ) Endorsement descriptions. An...	a knowledge test	https://referencesource.org/cdl-endorsement-prerequisites/double-triple-trailers/	[ "endorsement", "test_required" ]	null	null
No — a CLP may carry only the Passenger, School bus and Tank vehicle endorsements, and this is not one of them	[ "clp_eligible" ]	Hazardous Materials	hazardous-materials	https://www.ecfr.gov/current/title-49/section-383.93	The only endorsements allowed on a CLP are the following: ( i ) Passenger (P); ( ii ) School bus (S); and ( iii ) Tank vehicle (N). ( 3 ) The State must use the codes listed in <https://www.ecfr.gov/current/title-49/section-383.153> § 383.153 when placing endorsements on a CLP or CDL. ( b ) Endorsement descriptions. An...	a knowledge test	https://referencesource.org/cdl-endorsement-prerequisites/hazardous-materials/	[ "endorsement", "test_required" ]	[ { "as_of": "2026-08-19T00:00:00", "field": "federal_prerequisite", "source": "https://www.ecfr.gov/current/title-49/section-383.141", "source_quote": "( b ) Prohibition. A State may not issue, renew, upgrade, or transfer a hazardous material endorsement for a CDL to any individual authorizing that i...	[]
Yes — 383.93(a)(2) names this among the only endorsements allowed on a commercial learner's permit	[ "clp_eligible" ]	Passenger	passenger	https://www.ecfr.gov/current/title-49/section-383.93	The only endorsements allowed on a CLP are the following: ( i ) Passenger (P); ( ii ) School bus (S); and ( iii ) Tank vehicle (N). ( 3 ) The State must use the codes listed in <https://www.ecfr.gov/current/title-49/section-383.153> § 383.153 when placing endorsements on a CLP or CDL. ( b ) Endorsement descriptions. An...	a knowledge and a skills test	https://referencesource.org/cdl-endorsement-prerequisites/passenger/	[ "endorsement", "test_required" ]	[ { "as_of": "2026-08-19T00:00:00", "field": "clp_restriction", "source": "https://www.ecfr.gov/current/title-49/section-383.25", "source_quote": "( 5 ) Endorsements: ( i ) A CLP holder with a passenger (P) endorsement must have taken and passed the P endorsement knowledge test. A CLP holder with a P ...	[]
Yes — 383.93(a)(2) names this among the only endorsements allowed on a commercial learner's permit	[ "clp_eligible" ]	School bus	school-bus	https://www.ecfr.gov/current/title-49/section-383.93	The only endorsements allowed on a CLP are the following: ( i ) Passenger (P); ( ii ) School bus (S); and ( iii ) Tank vehicle (N). ( 3 ) The State must use the codes listed in <https://www.ecfr.gov/current/title-49/section-383.153> § 383.153 when placing endorsements on a CLP or CDL. ( b ) Endorsement descriptions. An...	a knowledge and a skills test	https://referencesource.org/cdl-endorsement-prerequisites/school-bus/	[ "endorsement", "test_required" ]	[ { "as_of": "2026-08-19T00:00:00", "field": "clp_restriction", "source": "https://www.ecfr.gov/current/title-49/section-383.25", "source_quote": "( ii ) A CLP holder with a school bus (S) endorsement must have taken and passed the S endorsement knowledge test. A CLP holder with an S endorsement is pr...	[]
Yes — 383.93(a)(2) names this among the only endorsements allowed on a commercial learner's permit	[ "clp_eligible" ]	Tank vehicle	tank-vehicle	https://www.ecfr.gov/current/title-49/section-383.93	The only endorsements allowed on a CLP are the following: ( i ) Passenger (P); ( ii ) School bus (S); and ( iii ) Tank vehicle (N). ( 3 ) The State must use the codes listed in <https://www.ecfr.gov/current/title-49/section-383.153> § 383.153 when placing endorsements on a CLP or CDL. ( b ) Endorsement descriptions. An...	a knowledge test	https://referencesource.org/cdl-endorsement-prerequisites/tank-vehicle/	[ "endorsement", "test_required" ]	[ { "as_of": "2026-08-19T00:00:00", "field": "clp_restriction", "source": "https://www.ecfr.gov/current/title-49/section-383.25", "source_quote": "( iii ) A CLP holder with a tank vehicle (N) endorsement must have taken and passed the N endorsement knowledge test. A CLP holder with an N endorsement ma...	[]

CDL endorsement prerequisites and testing sequence

Canonical, always-current version: https://referencesource.org/cdl-endorsement-prerequisites/ Machine-readable: https://referencesource.org/cdl-endorsement-prerequisites/data.json — this mirror is a point-in-time copy.

Last verified: 2026-08-19
Stale after: 2027-08-19 (past this date, prefer the canonical copy — it re-verifies on a cadence this snapshot does not)
Records: 5

Getting a CDL endorsement is a sequence, not a single application: which test type is required (knowledge-only vs. knowledge plus skills), whether the endorsement can be added at the commercial-learner's-permit (CLP) stage or only after a full CDL, and — for the hazardous materials endorsement specifically — a separate federal TSA security threat assessment that gates issuance independent of the state testing process, with its own renewal clock. Each record is one endorsement type, carrying the required test, its CLP eligibility, what the permit actually lets you drive once you have it, and any federal prerequisite beyond state testing. Being allowed an endorsement on a CLP is not the same as being allowed to do the work: a learner's permit tanker endorsement covers an empty tank only, and a permit passenger or school bus endorsement carries no passengers but examiners and trainees. Answers 'can I get my tanker endorsement on a learner's permit', 'can I haul a load on it', 'do I need a background check for a hazmat endorsement', 'how often does the TSA hazmat clearance have to be renewed'.

Provenance — what every record carries

Every record carries source (the URL the value was read from) and source_quote (a verbatim quote from that page stating it). A value you cannot check against its page is indistinguishable from an invented one; these can all be checked. Each record is also individually addressable on the canonical site at its url.

Licence position

US federal regulation — 17 USC 105, no copyright

Facts are not copyrightable; what this dataset takes from each source is a fact plus a short attributed quote linking back to the page that states it.

Sources

Fields

See any record in data/records.jsonl — field names are self-describing, and the canonical page for each record renders them with labels: https://referencesource.org/cdl-endorsement-prerequisites/

Downloads last month: 31

Number of rows:

Total file size:

19.3 kB