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NZ Hazardous Substances Training Records for Workers

September 29, 2026·14 min read

A worker may have handled solvents for years and still be unfamiliar with the chemicals, storage arrangement or emergency response at a new site. A signed induction sheet can show attendance, but it may not show what the worker was taught or whether they had the practical experience needed for their tasks. The record needs to connect the person to the hazardous substances, work, instruction and supervision actually provided.

New Zealand's Health and Safety at Work (Hazardous Substances) Regulations 2017, regulation 4.5 requires a person conducting a business or undertaking, or PCBU, to keep a record of the training and instruction provided under that regulation for each worker and make it available for inspection by an inspector or compliance certifier. WorkSafe's hazardous-substances training guide explains useful record details. This page translates those requirements into a practical recording workflow without treating a form as a substitute for effective training.

The subject is narrower than general health and safety induction. Regulation 4.5 addresses workers who use, handle, manufacture or store hazardous substances. Workers who are likely to be exposed can also require supervision under regulation 4.6, even where they do not perform the activities listed in regulation 4.5. Do not treat the two provisions as identical. This guide does not decide that a worker is qualified as a certified handler, determine whether a particular substance needs that certification or prescribe a universal training course.

First identify who the record is about

Start with the work, not a job title. Regulation 4.5 addresses workers who use, handle, manufacture or store hazardous substances. A cleaner, maintenance worker, storeperson or supervisor can perform one of those activities, depending on the actual task. Someone who only works nearby may still need protection, information or supervision under other duties, including regulation 4.6, but that fact alone does not place their training record within regulation 4.5. A list of everyone on payroll is not a useful substitute for deciding what each person actually does.

Map the workers to tasks and places. Note who receives, transfers, uses, stores, transports within the workplace, disposes of or supervises work involving the substances. Include temporary and newly assigned workers where their work falls within regulation 4.5. Consider separately whether other workers need supervision because they are likely to be exposed. Check whether contractors are workers of your PCBU for the relevant activity and how duties will be coordinated with another PCBU. The correct answer depends on the working relationship and control of the activity; this guide does not settle it from a badge or contract label.

The worker-by-worker record should identify the person unambiguously. A name alone can be ambiguous across shifts or sites, so an internal worker identifier and workplace can help. Include the role and tasks covered at the time of instruction. If the work changes, the old entry remains evidence of what was taught earlier, but it should not be silently presented as covering a new substance or process.

Use the workplace's substance inventory and safety data sheets to identify relevant hazards and tasks. Do not copy the entire inventory into every worker file. Instead, record enough detail to show which substances or coherent groups of substances the instruction covered. Regulation 4.5, subsection 4 allows information and training to cover a specific substance or groups with the same hazardous properties. Grouping by a vague label such as “all chemicals” can hide important differences. Grouping should still let a reviewer understand which hazards and procedures were addressed.

Separate information from training and instruction

The regulation describes information the PCBU must provide as well as training and instruction. Workers need to know about operations involving hazardous substances in their work area and where known reference material can be found, including safety data sheets. A record can show that a worker was told where to access the relevant SDS and which operations create exposure in their work area. That is a useful entry, but it is only part of the picture.

The training and instruction component is more detailed. Regulation 4.5, subsection 3 includes the physico-chemical and health hazards associated with the substances used at work. It also addresses applicable safe-use, handling, manufacture, storage and disposal procedures; practice in the safe use of plant and personal protective equipment needed to manage the substances; worker obligations; and actions to take in an emergency involving the substances. The regulation includes an appropriate period of practical experience under direct supervision in the workplace.

A useful record therefore distinguishes a briefing from a demonstrated task. An SDS location briefing, a spill-response demonstration and supervised practice in transferring a substance are different events. They may be delivered together, but the record should make their coverage visible. A tick beside “chemical training” does not tell a later supervisor whether the worker practised the equipment or merely saw a slide deck.

WorkSafe's quick guide suggests recording the training date, materials covered, trainer or institution, results of evaluation, qualifications obtained and other relevant information. Those are regulator guidance on a useful record, not a claim that regulation 4.5 mandates that exact form or set of fields. Use a format that captures the substance of the instruction and can be retrieved for inspection.

Build a record that answers real questions

Imagine an inspector asks whether a worker transferring a corrosive cleaner was trained before starting. A usable record should let the workplace answer who the worker was, what task they were assigned, which substance or hazard group was involved, what instruction they received, when and by whom, and whether practical supervised experience was completed. It should also identify any site-specific procedures and emergency steps covered. If those questions require reconstructing several unrelated spreadsheets and memories, the record is difficult to rely on.

A simple worker entry can contain these fields:

| Field | Why it helps | | --- | --- | | Worker and site | Identifies the person and workplace where the instruction applied. | | Task and substance or hazard group | Connects the record to the work and exposure. | | Date and instruction topic | Shows what was delivered and when. | | Procedure and SDS reference | Points to the version or location used at the time. | | Trainer or supervisor | Identifies who delivered instruction or supervised practice. | | Practical experience | Shows the workplace activity completed under direct supervision. | | Understanding check | Records a demonstration, observation or other evaluation, if used. | | Follow-up | Makes any gap, additional instruction or restriction visible. |

This is a suggested working design, not a statutory template. A small workplace may use a controlled register with linked attendance and observation notes. A larger one may use separate entries for classroom instruction, site induction and supervised experience. The system matters less than the ability to retrieve a coherent record for each worker and explain its relationship to current tasks.

Keep source documents available where they matter. If the entry says “spill procedure,” identify the procedure version or stable location. If the worker was shown where SDSs are kept, record that location and ensure access remains possible. Do not assume an old link still resolves or that an updated SDS has the same hazard details. A record should support supervision, not become a paper archive disconnected from the actual workplace.

Prior training does not erase site induction

Experienced workers may arrive with relevant prior training. Regulation 4.5, subsection 6 provides a route for a PCBU that can demonstrate, by documentation or certification, that a worker's previous experience or training resulted in training equivalent to the required training and instruction. In that situation the PCBU is not required to repeat the subsection 3 training unless it considers refresher training necessary. The words “can demonstrate” matter. A verbal assurance that someone has “always worked with chemicals” is weaker than documentation tied to the current tasks and hazards.

Compare the prior evidence with the specific instruction described in the regulation. Does it cover the actual hazardous properties? The procedure and equipment? Emergency action? Practical experience? A certificate title alone may not answer those questions. Record the equivalence decision, the evidence examined, any gaps and the person who made the workplace decision. Do not turn this into a generic rule that every qualification issued elsewhere is automatically portable to every workplace.

There is a second, separate step. Regulation 4.5, subsection 7 says a worker with equivalent training who is new to the workplace must receive site-specific induction and appropriate supervised experience at the new workplace. The worker may know the substance but not the site's storage layout, isolation controls, spill materials, evacuation arrangements or local equipment. Record the induction and supervised experience rather than using the prior-training certificate as the only entry.

Consider a technician transferred between two facilities owned by one company. The earlier training may be relevant, but the new facility could have a different transfer system or emergency response arrangement. Assess equivalence against the new work, provide local induction and supervised experience, and record the outcome. The move within one employer does not make the new site identical to the old one.

Document practical supervision without inventing a fixed duration

The regulation calls for an appropriate period of practical experience under direct supervision. It does not set one universal number of hours for every substance and task. A brief, low-complexity activity and a complicated transfer operation will not necessarily need the same demonstration and observation. The PCBU must consider the actual work and the risks, then decide what experience is appropriate.

The record can describe the supervised activity, the equipment used, the supervisor, dates, observed performance and any limits before unsupervised work. For example, it might say that a worker practised connecting a closed transfer line, checking for leaks and following the local isolation procedure under a named supervisor. If the worker could not complete part of the task safely, record the gap and follow-up. A signature alone is less useful than a description of what happened.

Do not label a worker competent solely because they attended training. WorkSafe's general worker-training guidance encourages employers to consider how workers demonstrate understanding, including observation or practical checks. That is guidance for designing effective training. Whether a particular worker may undertake a particular task without supervision still depends on their actual knowledge, experience, work and controls. The record supports that decision but cannot make it automatically.

Where more supervision is required, keep the operational restriction visible to those allocating work. Do not file a note in an inaccessible personnel folder while the scheduling system treats the worker as fully cleared. A later assessment can record that the restriction was changed and why. Retain the earlier entry so the sequence remains intelligible.

Review the record when the work changes

Training is not a one-time onboarding event. The WorkSafe hazardous-substances guide advises reviewing training and supervision when new substances, equipment, processes or controls are introduced, or when an incident or monitoring result shows a gap. That does not create a universal six-month or annual refresher rule under regulation 4.5. The trigger comes from the changed work and the need for workers to understand and perform it safely.

Set up a change process that asks whether existing instruction still covers the task. A new solvent can introduce different flammability or health hazards. A replacement piece of plant may require a different connection or isolation sequence. A revised SDS can alter control information. A change in roster can bring workers into a storage area they did not previously enter. A spill can reveal that workers did not know the emergency procedure. Each event may justify updated information, training, instruction or supervision.

When an update occurs, add a new entry or version rather than editing the old event to appear as though the worker knew the new procedure earlier. Date the change, identify the material and note the worker's subsequent instruction or practical experience. A record with clear chronology is more useful than a single current “trained” flag because it shows what was known at the time of each work period.

Prior training should be rechecked after a material change too. An equivalence decision made against one substance group or piece of equipment may not cover a newly introduced hazard. Record the new comparison, not just the old certificate. Where a worker moves between sites, use the new site's conditions to assess the induction and supervised experience required.

Do not confuse the specific rule with general record advice

WorkSafe's general guidance on training and supervision says training records are generally useful but not required under the general guidance it discusses. The same page points readers to separate hazardous-substances training guidance. For work within regulation 4.5, the specific record requirement in subsection 5 applies. Quoting the general sentence without the specific rule would give the wrong answer to the hazardous-substances question.

The opposite overreach is also possible. The specific hazardous-substances record rule does not mean every kind of workplace training record is required by regulation 4.5. Keep the scope tied to the worker, substance and activity. Other rules may impose their own evidence or certification requirements. Do not combine them into a single supposed universal training-record law.

The regulation requires a record and availability for inspection. It does not, in the provisions used here, prescribe a seven-year retention period for every worker's regulation 4.5 record. Avoid publishing an unsupported retention number. The workplace should identify any separate applicable recordkeeping and privacy obligations and set a documented retention approach that keeps records available for their intended regulatory and operational use. If a precise retention period matters to the organisation, verify the applicable rule before writing it into policy.

An inspector or compliance certifier may need to see the record. Organise access so the responsible person can retrieve the worker's training and instruction history without searching personal email or asking the trainer to remember. Limit access appropriately because worker records contain personal information. An accessible record is useful only if it is accurate and linked to current operations.

A practical audit before assigning the next task

Choose a real worker and a real task rather than reviewing a generic training matrix in isolation. Confirm that the worker's name and site are correct, the task is described, relevant substances or hazard group are identified and the instruction occurred before the worker undertook the activity requiring it. Check whether the record covers safe handling, equipment and PPE practice, emergency action and practical supervised experience where relevant. Look for the trainer, date and source material. Compare it with the workplace's actual procedure and available SDS.

Then ask what has changed. Was a new substance introduced? Has the worker moved sites or roles? Did the control measure or emergency plan change? Was there an incident or observed practice that indicates a knowledge gap? If so, record what further instruction and supervision will be provided and who is responsible. A training register should expose gaps so they can be fixed, not merely present every row as green.

Finally, test retrieval. Can the record be produced for an inspector or compliance certifier? Can the supervisor find the relevant current instruction without seeing unrelated personal information? Can the worker ask questions and find the SDS and local procedure? These are practical checks, not extra statutory form fields. They show whether the record system supports the regulation's purpose.

For broader substance inventory, SDS and workplace-control questions, use the New Zealand hazardous-substances overview. For the general PCBU duty, see HSWA duties. This guide owns the narrower worker-training record task. If you are considering Complys for managing safety information, ask to see the New Zealand product and confirm the current functionality against your workflow. No software can determine a worker's competence or discharge the PCBU's duties by itself.

Recheck this article if regulations 4.5 or 4.6 change, WorkSafe revises its hazardous-substances guidance, or a proposed product statement is later supported by verified implementation evidence. Until then, the useful question remains concrete: for each worker within regulation 4.5, can you show the relevant instruction, practical experience and site-specific induction that actually occurred?