Scheduling dangerous goods recurrent training tests across a workforce
Dangerous goods recurrent training is the refresher training and assessment that people who handle dangerous goods by air must repeat within 24 months of their previous training and assessment. Scheduling it across a workforce means working backward from each person’s expiry month, booking inside the allowed window, and standing people down if the date is missed. This guide shows how, as of November 2026.
It is written for dangerous goods training managers, quality staff and rostering leads at airlines, ground handlers, freight forwarders and training providers. Dates, approval routes and extensions differ by State, and this is not legal advice, so check your competent authority. For the assessment design itself, see our guide to building a dangerous goods CBTA assessment plan.
The pages that rank mostly state the 24-month interval or sell a refresher course. Few show how to calculate due dates, spread the load or decide what happens at expiry. That is what the tables below add.
Key takeaways
- The ICAO Technical Instructions, as reproduced by the UK CAA and IATA, require recurrent training and assessment within 24 months of the previous one, and an in-window renewal keeps the old cycle.
- Renewing in the final three months of validity means the new validity runs 24 months from the previous expiry month, so booking earlier than the window loses time.
- Once training has expired, the UK CAA says personnel are not permitted to carry out dangerous goods functions, so your tracker must feed the roster, not just a report.
- Store the rule set, completion month, expiry month and plan version for each person, because the 24-month air cycle, the US three-year rule and function-change triggers are separate clocks.
How often must dangerous goods recurrent training be repeated?
For air transport under the ICAO Technical Instructions, recurrent training and assessment is due within 24 months of the previous training and assessment. US hazmat employee rules in 49 CFR 172.704 use a different interval: at least once every three years. Which clock applies depends on your operation and State, so confirm it with your authority.
The table lists each rule source we read, what it says and what it means for a scheduler. Wording is quoted only where marked.
| Source | What it says | Scheduling consequence |
|---|---|---|
| UK CAA CAP 483, 5th edition, Part A para 1.8 | Personnel “must receive recurrent training and assessment within 24 months of previous training and assessment” (quoted) | Due date is 24 months from the previous cycle |
| IATA Dangerous Goods Training Guidance, 6.1.6.2(b) | Recurrent training is required “within 24 months of previous training to ensure knowledge is current” (quoted), with a carry-over rule for the final three months | Open a booking window before expiry |
| IATA guidance, 6.1.6.2(a) | “Initial training must be provided prior to a person performing their functions” (quoted) | The guidance text we read has no supervised-work allowance for new staff |
| UK CAA CAP 483, para 1.6 | Trained personnel assigned to new functions must be assessed for those functions | A function change is its own trigger |
| 49 CFR 172.704(c)(1) and (c)(2) | New or reassigned hazmat employees may work under direct supervision if training is “completed within 90 days after employment or a change in job function”; recurrent training is “at least once every three years” (quoted) | US hazmat employees run on a separate clock |
The US interval and the ICAO interval are different rules, not typos. The FAA’s shipper training page lists both without saying which governs a given shipment. If you are unsure, schedule to the shorter interval and ask your authority.
How do you calculate the next dangerous goods recurrent training due date?
Count validity in months, then book inside the final three months of validity. IATA’s guidance says that if recurrent training is completed in that window, the new validity runs until 24 months after the previous expiry month. Booking earlier than that shortens the cycle, and booking later means expiry.
The sources define the window as the “final three months” without naming the months. One Australian training provider’s worked example treats it as the expiry month plus the two before it. The table uses that reading and counts by month, which is our own illustration. Confirm both points with your authority.
| Case | Valid through | Recurrent completed | New valid through | Why |
|---|---|---|---|---|
| First course | None | May 2025 | May 2027 | 24 months counted from the completion month |
| Inside the window | May 2027 | April 2027 | May 2029 | 24 months after the previous expiry month, so nothing is lost |
| Too early | May 2027 | January 2027 | January 2029 | Our reading: outside the window the cycle restarts from completion, so four months are lost |
| Too late | May 2027 | June 2027 | Not current | Stand down until current; the authority decides whether a refresher or full course is needed |
Record the date of the passed assessment, not attendance. The rule speaks of training and assessment, so a person who sat the course but has not yet passed should not move to a new expiry month.
Pro tip: Book The Window, Not The Date. Have your calendar open booking on the first day of the window month and treat every booking before it as an exception that needs a reason. A single early test costs the months between it and the window.
What happens when dangerous goods training expires?
Expired training means the person stops dangerous goods work until they are current again. The UK CAA’s CAP 483 states that where training has expired, “personnel are not permitted to carry out any functions with respect to dangerous goods” (quoted), and that a full course may need to be attended. Check how your authority treats lapses.
That makes expiry an operations problem, not a paperwork one. The UK CAA’s CAP 483 also says responsibility for competence stays with the employer, so a missed date cannot be passed to a course provider. Link the tracker to whoever allocates work, so an expired person drops off the dangerous goods roster automatically.
What about people who leave the function for a while?
IATA’s guidance separately recommends a step before someone returns after a break in the function, which is not the same as expiry. The table shows the recommendations in Table 6.1.D as we read them. They are recommendations, so your authority or client may set stricter ones.
| Time away from the function | Recommended step before returning |
|---|---|
| Up to 3 months | Brief the person on regulatory or business changes and confirm they understand them |
| 3 to 12 months | The above, plus a practical assessment such as a simulation, and a short observation report identifying gaps |
| More than 12 months | Complete a recurrent training program |
Who owns each step of the recurrent schedule?
The employer owns accountability, and the schedule needs named owners below that. Splitting the work by role prevents the common failure where everyone assumes someone else watches the expiry list. The roles below are our suggestion, not a regulatory list.
| Role | Owns | Evidence it leaves |
|---|---|---|
| Training coordinator | Calendar, window opening, seat and assessor capacity | Booking log |
| Line manager | Releasing staff and removing expired staff from dangerous goods duties | Roster stand-down note |
| Authorized assessor | Running and recording the assessment | Result with the assessor named |
| Records owner | Completion months, expiry months, retention | The record set |
| Accountable manager or quality lead | Monthly review of expiries and exceptions | Signed review |
How do you spread due dates so the test calendar does not jam?
Stagger cohorts on purpose. Every person’s recurrent month is inherited from their last course month, so a large cohort trained together comes due together. The three-month window gives you room to spread them without losing time, but only that much.
Take 120 people who all completed their first course in one month. In two years they all hit the same window, which is at best 40 test sittings a month across three months. Trained evenly across 24 months, the same 120 people would need 5 a month (120 divided by 24). The figures are illustrative, but the arithmetic is why cohort planning matters.
Check assessor capacity too. If the recurrent plan includes practical observations, the number of observers limits the schedule more than seats do. Our recertification and recurrent testing guide covers automating the reminder side.
Pro tip: Split Big Cohorts At Initial Training. When you onboard a large group, run the first courses across two or three months instead of one. The split costs little now and removes a recurrent bottleneck two years later.
What should the tracker record for each person?
Record enough to show who was trained, when, on what and against which rules. IATA’s guidance and CAP 483 both require records of training and assessment to be kept for at least 36 months from the most recent completion month, and 49 CFR 172.704(d) lists required US fields. Fields beyond those are our suggestion.
- Name, function and the proficiency level the function requires.
- Rule set that applies (ICAO Technical Instructions, 49 CFR 172.704 or both) and any authority-set extension.
- Completion month of the last passed assessment and the expiry month.
- Training provider, materials reference and assessor.
- Plan or course version, so a rule change can be traced to affected people.
- Booking status and the date a stand-down took effect, if any.
The eCFR text of 49 CFR 172.704, shown as current to 22 October 2026, requires a US record with the employee’s name, most recent completion date, training materials, provider and a certification of training and testing. It must be kept while the person is employed in the role and for 90 days afterward. Our post on how assessment results move into aviation training records covers which fields should travel.
The authority-set extension field matters. In 2020, ICAO published a quick reference guidance sheet describing a temporary alleviation: States could extend recurrent validity, with the end date set by the State and no later than 31 March 2021, as ICAO’s recurrent training guidance explains. That sheet is historical, but it shows why a tracker needs an override, not a hard-coded 24.
What reminder schedule works?
Use reminders that match the window, not the expiry date. The cadence below is our suggestion for a 24-month cycle, and every message should name the expiry month.
- About 120 days before expiry: coordinator checks seats and assessor time.
- Window opens, three months out: person and manager are told to book.
- One month out: unbooked people go on a list for the quality lead.
- Expiry month ends: unassessed staff are stood down from dangerous goods duties.
What should you do next?
Export every dangerous goods staff member with the date of their last passed assessment and calculate each expiry month using the worked table above. Sort by expiry and mark everyone due within six months. That list is your first schedule.
Then decide who removes expired staff from the roster, and write it into your procedure. SimpliAssess’s features page lists Schedule Management, Examinee Management and Analytics and Reporting; its published pages do not describe expiry dates, reminders or dangerous goods use, so test any tool against the table above. SimpliTrain, a separate training platform from the same company, describes on its certification management page compliance tracking that shows who has earned a certificate for a mandatory program, filterable by team, location or deadline.
Frequently asked questions
How often is dangerous goods recurrent training required?
For air transport under the ICAO Technical Instructions, within 24 months of the previous training and assessment, according to the UK CAA’s CAP 483 and IATA’s training guidance. US hazmat employee rules in 49 CFR 172.704 require it at least once every three years. Your State’s rules and your operation decide which applies.
Can you renew dangerous goods training early without losing time?
Only inside the final three months of validity. IATA’s guidance says completing recurrent training in that window makes the new validity run 24 months from the previous expiry month. Earlier than that, our reading is that the cycle restarts from the completion month, so you lose the months in between. Confirm with your authority.
What happens if dangerous goods training expires?
The person must stop dangerous goods functions until they are current. The UK CAA’s CAP 483 says personnel with expired training are not permitted to carry out any dangerous goods functions and may need a full course. Other authorities may treat lapses differently, so check your competent authority and write the stand-down step into your procedure.
Do the 24-month and three-year rules conflict?
They are separate rule sets, not one rule with two numbers. The ICAO Technical Instructions and IATA guidance use 24 months for air transport, while 49 CFR 172.704(c)(2) uses three years for US hazmat employees. If both could apply to the same person, scheduling to the shorter interval is the cautious choice, but confirm it.
How long must dangerous goods training records be kept?
IATA’s guidance and CAP 483 both say at least 36 months, counted from the most recent training and assessment month. Under 49 CFR 172.704(d), a US employer keeps the record of current training while the person is employed in the role and for 90 days after. Your authority may require longer.
Can an external provider run our recurrent tests?
Yes, with limits. The UK CAA says external providers may deliver training or assess competence, but responsibility for competence stays with the employer. Your tracker should therefore record the provider and assessor for each result, and your own schedule should still own the due dates and stand-downs.
