How Long Is Aerial Lift Certification Good For?

September 17, 2026

How long is aerial lift certification good for? Ask ten safety managers and eight will say three years, one will say it never expires, and one will say it depends on the machine. The eight are repeating a convention, the one is reading OSHA literally, and the last one is closest to right. OSHA never wrote an expiration date for aerial lift or MEWP operator training. ANSI A92.24, the standard that now defines what that training has to contain, does not put a number of years on it either. What both do is name the events that end a certification early, and leave the calendar to the employer. That is a less satisfying answer than “three years,” but it is the one an inspector, an owner’s safety representative, or an attorney will actually hold you to, and once you understand where the three-year figure comes from you can write it into your program with a straight face instead of a shrug.

This guide walks through what the regulations say, where the convention came from, what the ANSI standard requires in place of a date, the five triggers that reset the clock, and how to build an interval into a training program so the documentation holds up. It covers boom lifts, scissor lifts, and everything the A92 standards now call a mobile elevating work platform. Forklift certification has its own rule and its own explicit three-year requirement, covered in the forklift refresher training requirements post; confined space training has a similar no-date problem, covered in how long confined space training is good for.

The number OSHA never wrote

Two OSHA standards govern aerial lift operators, and neither contains an expiration interval.

In construction, aerial lifts fall under the scaffold standard. 29 CFR 1926.453 covers the equipment itself and pulls in the old ANSI A92.2-1969 design standard, while 29 CFR 1926.454 carries the training duty: each employee who works on a scaffold, and OSHA treats an aerial lift platform as one, has to be trained by a person qualified in the subject matter to recognize the hazards and to know the procedures to control them. Paragraph (c) then lists when retraining is required, and the list is about circumstances, not calendars: changes at the worksite that present a hazard the employee was not trained on, changes in the type of scaffold, fall protection, falling-object protection or other equipment, and inadequacies in the employee’s work that show the proficiency was not retained.

In general industry, 29 CFR 1910.67 covers vehicle-mounted elevating and rotating work platforms. Its operating rule is a single sentence: only authorized persons shall operate an aerial lift. “Authorized” implies trained, and OSHA letters of interpretation and citations have consistently read it that way, but the standard itself does not say how the authorization is renewed or when it lapses.

So the regulatory answer to “how long is my certification good for” is: for as long as the employer can show the operator is still trained, still authorized, and none of the retraining triggers has fired. That answer is legally accurate and operationally useless, which is why the industry filled the gap with a number.

Where “three years” actually comes from

The three-year figure did not come from the aerial lift standards. It came from the forklift rule next door. 29 CFR 1910.178(l)(4)(iii) requires an evaluation of each powered industrial truck operator’s performance at least once every three years, and because forklift and aerial lift training are usually bought from the same vendor, delivered in the same room, and tracked in the same spreadsheet, the three-year evaluation migrated to the aerial lift card without anyone deciding it should.

Three other sources reinforced it.

• Card issuers. Most training providers print an expiration date on the wallet card, usually three years out, because a card with no date generates phone calls and a card with a date generates repeat business. The date on the card is the provider’s policy, not a regulation.
• International cards. The IPAF PAL card, common on projects with international contractors and on some U.S. sites that adopted it, is valid for five years. Crews that have worked both systems bring both numbers back with them.
• Owner and contractor programs. Refineries, utilities, large general contractors and federal projects write their own intervals into site rules and prequalification questionnaires, and three years is the number most of them chose because it was already the forklift number. Once a site rule says three years, that is the interval that governs on that site, whatever the standard says.

None of this makes three years wrong. It makes it a convention, and conventions are fine as long as the program that adopts them says so in writing. The risk is the manager who believes the number is regulatory, lets a card run to the day before its printed expiration, and cannot explain in a post-incident interview why an operator who had been seen misusing a boom lift eight months earlier was never retrained.

What ANSI A92.24 requires instead of a date

The 2018 revision of the ANSI A92 series replaced the old aerial work platform standards with three documents: A92.20 for design, A92.22 for safe use, and A92.24 for training. Together they retired “aerial work platform” in favor of “mobile elevating work platform,” or MEWP, and they moved the conversation from “did the operator take a class” to “can the employer show the operator is trained, familiarized, evaluated and supervised.”

A92.24 splits the operator side into two things that programs routinely confuse.

Training is about the category; familiarization is about the machine

Operator training covers the hazards and rules of a MEWP classification: how the machine tips, what the platform load and wind limits mean, fall protection, pre-start inspection, the workplace risk assessment, rescue planning, and the hands-on demonstration that the operator can actually run one. It is general to the group and type of machine. Familiarization is specific: before an operator runs a particular make and model, someone has to walk them through that machine’s controls, safety devices, manufacturer warnings and operating characteristics. A three-year-old card for a Group A scissor lift says nothing about whether the operator has been familiarized on the 60-foot articulating boom that arrived on the rental truck this morning. Most citations that surprise employers on this topic are familiarization gaps, not expired cards.

Occupants and supervisors have their own training

A92.24 also requires training for occupants, the people on the platform who are not operating it, and for MEWP supervisors, the people who assign the work and are supposed to know when a machine, a site condition or an operator is wrong for the job. Supervisor training is the part most programs have never delivered, and it is the one an auditor with a copy of the standard asks about first. Our aerial lift training program covers operator, occupant and supervisor content so the whole chain is documented, not just the person on the controls.

Retraining on need, not on schedule

The standard makes the user, which in practice means the employer, responsible for evaluating operators and retraining when the evaluation, an incident, or a change in machines or conditions shows it is needed. It does not put a number of years on that duty. Employers who want a number have to supply it themselves, and the standard’s silence is the strongest argument for writing one into the program: without it, “we retrain when needed” becomes “we never retrained,” and there is no document that says otherwise.

The five triggers that end a certification early

Whatever interval a program adopts, these events override it. They are drawn from 1926.454(c), from the forklift rule’s retraining list that most programs borrow, and from A92.24’s evaluation duty, and every one of them has shown up in an incident file where the card was still “valid.”

1. An incident or near miss. A tip-over, a contact with a structure or power line, an entrapment, a dropped tool from the platform, or a close call that anyone reported. Retraining is part of the corrective action, and its absence is the first thing an investigator notes.
2. Observed unsafe operation. Driving elevated across uneven ground, leaning over the guardrail, climbing on the mid-rail, skipping the harness on a boom, overriding a tilt alarm. The supervisor who sees it and says nothing has, in the standard’s eyes, evaluated the operator and passed them.
3. A different type or classification of MEWP. A scissor lift operator moving to a boom lift, or a Group A operator moving to Group B, needs training for the new classification, not just familiarization. The tipping behavior is different and so is the fall protection.
4. A change in the worksite or the work. New overhead hazards, a different floor or ground condition, work near energized lines, wind exposure on an elevated structure, or a task the original training did not cover.
5. A failed or overdue evaluation. A periodic evaluation the operator does not pass, or one that was never done, is itself a trigger. Programs that evaluate on the three-year cycle and document the result close this gap; programs that only re-run the class do not, because a class is not an evaluation.

A sixth, practical trigger belongs on the list even though no standard names it: a long gap in use. An operator who has not been on a platform in eighteen months has not lost the card, but has probably lost the habits, and a short re-evaluation before the next job costs less than the alternative.

How long is aerial lift certification good for on your site? Write the interval down

The employer decides, and the decision has to be in the written program before anyone needs to defend it. The pieces that hold up, in the order we build them:

Pick three years unless a rule you work under says less

Three years is defensible precisely because it matches the forklift rule and the industry convention; nobody has to explain it. Adopt it as the maximum interval between operator evaluations, state in the program that the five triggers override it, and state that a shorter interval applies wherever a customer, owner, contract or site rule requires one. Many federal and refinery sites do, and the shortest interval in force governs.

Evaluate, do not just re-run the class

The forklift rule’s three-year requirement is for an evaluation of performance, and the same logic serves MEWPs: at the interval, a qualified person watches the operator run the machine through a pre-start inspection, a function check, positioning, elevated travel where the classification allows it, and a lowering and stowing sequence, and records the result. The evaluation can be paired with a refresher class, and usually is, but the evaluation is the document that matters. It is also the only honest way to satisfy A92.24’s demand that the employer know whether the operator is still competent.

Document the four things that get asked for

• Initial training: date, trainer, content covered, the classifications trained (Group A or B, Type 1, 2 or 3), and the hands-on evaluation result.
• Familiarization: make and model, date, who delivered it. A one-line log entry per machine is enough; its absence is not.
• Periodic evaluation: date, evaluator, machine used, pass or retrain.
• Retraining events: the trigger, the date, and what was delivered.

The wallet card is a convenience for the operator and a courtesy to the gate guard. The employer’s file is the certification. Employers who confuse the two find out during an inspection that the card was issued by a vendor who no longer exists and the file behind it was never built. The fall protection equipment inspection post covers the parallel record for the harnesses and lanyards the operators are wearing; the two files are usually requested together.

Does the clock differ for boom lifts and scissor lifts?

The interval does not; the training does. Under the A92 classification, a Group A machine keeps the platform inside the tipping lines, which describes most scissor lifts, and a Group B machine can extend the platform beyond them, which describes boom lifts. Type 1 machines travel only stowed, Type 2 travel elevated under control from the chassis, and Type 3 travel elevated under control from the platform. An operator trained on a Group A, Type 3 scissor lift has not been trained for a Group B, Type 3 articulating boom, and the difference is not paperwork: boom lifts throw operators, scissor lifts tip, and the fall protection rules differ accordingly. Cross-training is the normal answer on mixed fleets, and each classification carries its own evaluation record. What stays the same is the interval and the triggers. Our equipment operator training page lists the classifications we cover and how mixed-fleet programs are structured.

Federal, owner and contractor rules that shorten the interval

Federal construction under the U.S. Army Corps of Engineers safety manual, EM 385-1-1, requires MEWP operator training consistent with the ANSI A92 series and expects the documentation on site with the machine; the edition your contract cites controls the specifics, and the government’s representative will read it literally. Refineries and chemical plants commonly require annual refreshers regardless of the three-year convention, and some require site-specific MEWP orientation on every mobilization. General contractors increasingly ask for MEWP training and familiarization records in prequalification packages, alongside the fall protection requirements that EM 385 layers on top of OSHA. In every one of these cases the rule that shortens the interval is the one that governs, and the employer’s program should say that in one sentence so nobody has to argue it at the gate.

Two practical notes from the field. First, when a site requires an annual refresher, deliver it as an evaluation with a short review, not a repeat of the full class; the standard is satisfied and the crew does not lose a day. Second, keep the classification on the record. A site that asks for “aerial lift training” and receives a scissor-lift-only record for a crew running booms has caught a gap the employer should have caught first.

Common questions

Does OSHA require aerial lift certification to be renewed every three years?

No. Neither 1926.454 nor 1910.67 sets a renewal interval. The three-year figure comes from the forklift rule, 1910.178, and from training provider and site-rule conventions. OSHA does require retraining whenever conditions, equipment or observed proficiency change, and it expects the employer to be able to prove the operator is currently trained and authorized.

Is “aerial lift certification” the same as MEWP certification?

Functionally, yes. The 2018 ANSI A92 standards replaced “aerial work platform” with “mobile elevating work platform,” and training delivered to A92.24 is what most people now mean by aerial lift certification. Cards and records printed with either term are describing the same training, though older cards may predate the familiarization and supervisor requirements.

Does the certification transfer between employers?

The training does; the authorization does not. A new employer can accept prior training if it can verify the content and the classification, but it still has to authorize the operator, familiarize them on its own machines, and take on the evaluation duty. Most employers re-evaluate on hire because it is faster than verifying someone else’s record.

Does the card expire if the operator has not used a lift in a year?

No standard says so, and a program should. A long gap is not a regulatory trigger, but it is the most common reason a “current” operator performs badly on the first day back. A short re-evaluation before the next assignment is the practical answer.

Can an employer set an interval shorter than three years?

Yes, and many owners require one. The interval is the employer’s to set; three years is a maximum by convention, not a minimum by rule. Whatever interval the program adopts should be written down, applied consistently, and overridden by the five retraining triggers.

Who can deliver the retraining and the evaluation?

A person qualified in the subject matter, in OSHA’s language, which means someone with the training and experience to teach the hazards and to judge the operator’s performance. An in-house trainer who has been through a train-the-trainer program qualifies; a supervisor with a card and no training background usually does not. The competent person post covers how OSHA’s qualification language works across standards.

Put a date on it before an inspector does

The interval you never wrote down is the one you will be asked to justify. Tell us how many operators you have, which machines they run, and which owners or contracts you work under, and we will scope aerial lift training that covers operators, occupants and supervisors to A92.24, deliver the evaluations on your equipment, and leave you a file that answers “how long is it good for” with a program instead of a guess. Start the conversation here and we will come back with dates and a plan, not a brochure.