49 CFR Part 172, Subpart H is the section of the Hazardous Materials Regulations that governs training. Section 172.704 is the part that tells an employer what the training must cover, when it has to happen, and what proof has to exist afterwards. It is short. It is also the section that turns up first in a PHMSA inspection, because a missing training record is the easiest violation in the world for an inspector to document.
This guide summarises the rule in plain English. It is not legal advice, and it is not a substitute for reading the regulation. The current text is at eCFR § 172.704.
Who the rule applies to
Two definitions in 49 CFR 171.8 do most of the work, and they are broader than most employers expect.
A hazmat employee is, in the regulation's own words, a person employed on a full-time, part-time or temporary basis by a hazmat employer “who in the course of such full time, part time or temporary employment directly affects hazardous materials transportation safety.” The definition also reaches the self-employed, including owner-operators.
A hazmat employer is a person who employs or uses at least one hazmat employee and who transports hazardous materials in commerce, causes them to be transported in commerce, or designs, manufactures, marks, maintains, reconditions, repairs or tests packagings represented as qualified for hazmat use.
“Directly affects transportation safety” is a description of a task, not a job title. The warehouse worker who tapes a label on a box, the clerk who signs a shipping paper, the shift lead who decides how pallets are segregated and the driver who loads them are all capable of meeting it. So is the person who ships a single case of aerosols, perfume or lithium batteries. Nobody has “hazmat” in their title and everyone in that chain may still be a hazmat employee.
The five training categories
Section 172.704(a) lists five kinds of training. The first four apply broadly. The fifth applies only to a narrow group. They are cumulative, not alternatives — you do not pick one.
Training “designed to provide familiarity with the requirements of this subchapter” and to enable the employee to recognise and identify hazardous materials. The hazard classes, the Hazardous Materials Table, markings, labels, placards and shipping papers live here.
Training on the requirements “specifically applicable to the functions the employee performs.” This one is different for a packer, a driver and a shipping clerk, which is why no off-the-shelf course can finish it for you on its own.
Emergency response information, measures to protect the employee from the hazards they are exposed to, and methods and procedures for avoiding accidents. This is not emergency-responder training and it is not HAZWOPER.
Training that provides “an awareness of security risks” associated with hazmat transport and methods to recognise and respond to possible security threats. Required broadly since 2003.
Only for employees of an employer required to have a security plan under Part 172, Subpart I. Covers the company's security objectives, its organisational security structure and its specific security procedures. Most small warehouse and courier operations are not in scope.
What our course covers — and what it does not
We would rather be specific about this than let you find out later. Here is our DOT Hazmat Core Training mapped against the five categories.
| Category (49 CFR 172.704(a)) | Our core course | What that means for you |
|---|---|---|
| (1) General awareness | Included | Covered in full for ground transport. |
| (2) Function-specific | Baseline only | We cover common warehouse and ground-shipping tasks: handling checks, shipping paper preparation, placarding and attendance. You remain responsible for training on each employee’s actual duties. |
| (3) Safety | Included | Exposure routes, SDS and the Emergency Response Guidebook, protective actions, notification, evacuation and incident reporting. |
| (4) Security awareness | Included | Threat recognition and reporting. |
| (5) In-depth security | Not included | If you are required to have a security plan under Subpart I, you need this separately. |
No online course can complete function-specific training for duties it has never seen. Any provider claiming a single generic course makes you fully compliant for every role is selling you a gap you will discover during an inspection. The honest version is the one above: a course carries the general categories, and the employer closes the function-specific gap for the job each person actually does.
When training is due
Two deadlines matter, and they are covered in 49 CFR 172.704(c).
- New hazmat employees: a new employee, or one who changes job function, may perform hazmat duties before completing training provided they do so under the direct supervision of a properly trained and knowledgeable hazmat employee. Training must be completed within 90 days after employment or the change in job function.
- Recurrent training: required at least once every three years.
- In-depth security training: also on a three-year cycle, and additionally within 90 days of the implementation of a revised security plan.
The three-year clock and the 90-day clock trip up different companies for different reasons, and there are events that force retraining before the cycle is up. We break all of that down in how often DOT hazmat training is required.
The records you must keep
Training that happened but cannot be evidenced is, from an inspector’s point of view, training that did not happen. Section 172.704(d) requires the employer to create a record for each hazmat employee and keep it for as long as that employee is employed, plus 90 days after employment ends.
Each record must contain five things:
- The hazmat employee’s name.
- The most recent training completion date.
- A description, copy, or the location of the training materials used.
- The name and address of the person providing the training.
- Certification that the hazmat employee has been trained and tested.
Item five is the one people miss: the rule says trained and tested. A completion certificate with no assessment behind it does not satisfy it on its own.
If you want a blank form with those five fields already laid out, download our free 172.704(d) record template. If you want to know how long to hold records and how to hand them over in an inspection, read the recordkeeping and audit guide.
Who is responsible
The employer. Not the training vendor, not the employee, not the carrier you hand the freight to. Section 172.702 places the duty on the hazmat employer to ensure each hazmat employee is trained in accordance with Subpart H, and 172.704(d) places the recordkeeping duty in the same place.
Practically, that means three things. Buying a course does not transfer liability to the course provider. A certificate issued to your employee is evidence, not a shield. And if the record is missing when someone asks, it is your violation, whoever ran the training.
It cannot take the obligation off your shoulders. What it can do is make the obligation cheap to meet: train the employee in a language they genuinely understand, test them, and hand you a dated 172.704(d) record with the trainer’s name and address already on it, stored where you can find it three years from now.
Common questions
Does 49 CFR 172.704 apply to small companies?
Yes. The training requirement attaches to the function an employee performs, not to the size of the employer. There is no small-business exemption in 49 CFR 172.704, and there is no minimum number of shipments before it applies.
Is there such a thing as a DOT-certified hazmat course?
No. PHMSA does not accredit, approve or certify hazmat training providers or their courses. Any vendor advertising an "official DOT certification" is describing something that does not exist. What the rule requires is that the employee be trained and tested, and that the employer keep a record certifying it.
Can one online course satisfy all five categories?
It can satisfy general awareness, safety and security awareness for most ground-transport roles, and it can provide a function-specific baseline. It cannot satisfy function-specific training for duties it does not cover, and it does not provide in-depth security training, which applies only to employers required to have a security plan under 49 CFR Part 172 Subpart I.
Who has to keep the training record, the employee or the employer?
The employer. 49 CFR 172.704(d) puts the recordkeeping duty on the hazmat employer, who must create and retain the record for as long as the employee is employed and for 90 days after that.
Complete your core General Awareness, Safety and Security training online
Bilingual English and Spanish training built to 49 CFR 172.704, with an assessment, a Certificate of Completion and a 172.704(d) training record generated for every person who passes.
Certificate of Completion and a 49 CFR 172.704(d) training record for every person who passes. Secure checkout with Stripe. No sales call. See team plans for 5 and 10 employees, or how the online course works.