eCFR and the Code of Federal Regulations
The Electronic Code of Federal Regulations (eCFR) is an online editorial compilation of the Code of Federal Regulations, maintained by the National Archives and Records Administration (NARA). It is updated continuously as regulatory changes take effect, making it more current than the annual print CFR edition. eCFR.gov is publicly accessible and searchable, making it the most practical first reference for looking up specific regulatory sections.
For ELD requirements, the relevant eCFR sections are in Title 49 (Transportation), Part 395 (Hours of Service of Drivers), Subpart B. The technical performance specifications for ELDs — including the malfunction definitions used on this site — are in Appendix A to Subpart B. These specifications define the eight ELD malfunction categories, data diagnostic events, and the testing requirements for certified devices.
Primary CFR Sections for ELD Compliance
49 CFR 395.8 covers records of duty status — what drivers must record and retain for HOS compliance. 49 CFR 395.15 describes when ELDs are required, which driver categories are exempted, and what the transition rules look like. 49 CFR 395.22 covers motor carrier responsibilities for ELD provision, training, and policies. 49 CFR 395.24 covers driver responsibilities including ELD use, annotations, and data review.
49 CFR 395.34 is the malfunction response section — it defines what drivers must do when an ELD malfunction occurs, the 24-hour carrier notification requirement, the 8-day repair window, and the paper log requirements when the window expires. This section is the primary regulatory basis for the ELD malfunction content on this site.
How This Site Uses eCFR
eCFR sections are cited on this site when a specific regulatory requirement — a defined malfunction category, a required response timeline, a data element specification — is the factual basis for an explanation. The citation links to the specific CFR section or appendix so users can verify the source directly. eCFR text is not reproduced; the citation allows users to read the regulatory language in context.
eCFR citations on this site reflect the text at the time of the last content review. Regulatory amendments, FMCSA rulemakings, and eCFR corrections can change the text after a review date. The source registry records the accessed date for each eCFR citation. Before making compliance decisions, verify the current eCFR text at ecfr.gov.
eCFR vs. Other Reference Sources
eCFR is the most current publicly available form of the regulation, but the official CFR print edition (published annually in the Federal Register) is the legal standard. In cases of conflict between eCFR and the official CFR, the official CFR governs. For most practical purposes — understanding what the regulation says, citing a specific section — eCFR is the appropriate reference.
FMCSA guidance documents and FAQ publications explain how the agency interprets eCFR requirements. This site uses both: eCFR for the regulatory text basis of malfunction definitions and requirements, and FMCSA guidance for explanatory context about how those requirements apply in practice.
Related Pages
Sources
- SAE J1939 Standards Collection SAE International · official · accessed 2026-05-05 · confidence medium
Source: SAE International, SAE J1939 Standards Collection. This page paraphrases factual fields only and is not a substitute for the original document.
Open source - ELD Malfunctions and Data Diagnostic Events Federal Motor Carrier Safety Administration · government · accessed 2026-05-05 · confidence high
Source: Federal Motor Carrier Safety Administration, ELD Malfunctions and Data Diagnostic Events. This page paraphrases factual fields only and is not a substitute for the original document.
Open source - 49 CFR 395.34 - ELD malfunctions and data diagnostic events Electronic Code of Federal Regulations · government · accessed 2026-05-05 · confidence high
Source: Electronic Code of Federal Regulations, 49 CFR 395.34 - ELD malfunctions and data diagnostic events. This page paraphrases factual fields only and is not a substitute for the original document.
Open source
FAQ
What eCFR sections cover ELD requirements?
The primary eCFR sections for ELD requirements are: 49 CFR 395.8 (records of duty status), 49 CFR 395.15 (ELD use requirements), 49 CFR 395.22 (motor carrier responsibilities), 49 CFR 395.24 (driver responsibilities), and 49 CFR 395.34 (ELD malfunctions and data diagnostic events). Appendix A to Subpart B of Part 395 contains the technical specifications for ELD performance and malfunction definitions.
Is eCFR regulatory text the same as the Code of Federal Regulations?
eCFR (Electronic Code of Federal Regulations) is an editorial compilation of CFR content maintained by the National Archives. It is updated more frequently than the official CFR print edition and is considered an authoritative reference, but the official CFR (published in the Federal Register) is the legal standard. For compliance decisions, verify against the official CFR or current Federal Register publications.
Does this site reproduce eCFR text?
No. This site summarizes and explains eCFR concepts in original language as an educational reference. It does not copy CFR regulatory text. Direct citations and links to specific CFR sections are provided so users can verify the primary source. This is consistent with this site's source-gated publishing approach, which avoids reproducing source text wholesale.