OSHA Lockout/Tagout Retraining: What “Change” Really Means Under 1910.147(c)(7)(iii)(A)
The retraining trigger in OSHA’s lockout/tagout (LOTO) standard is often misunderstood. Many programs treat retraining as periodic or annual. That is not what the regulation requires. The obligation is event-driven, and the key word driving that obligation is “change.”
This article breaks down exactly what OSHA requires under 29 CFR 1910.147(c)(7)(iii)(A), what constitutes a “change,” and what must actually occur from a training standpoint.
The Regulatory Requirement
Under 29 CFR 1910.147(c)(7)(iii)(A):
Retraining shall be provided whenever there is:
A change in job assignments
A change in machines, equipment, or processes that present a new hazard
A change in the energy control procedures
There is no time-based requirement here. Retraining is triggered by conditions, not by a calendar.
What OSHA Means by a “Change”
OSHA does not define “change” in a single sentence. However, combining the regulatory text with OSHA interpretation guidance provides clarity.
A key insight from an OSHA Letter of Interpretation:
Even when equipment changes do not introduce entirely new hazards, retraining may still be required if:
Job assignments change
Procedures change
The way the equipment is used differs
Practical Interpretation
A “change” exists when the employee’s required knowledge, hazards, or procedural steps are no longer identical to what they were trained on.
This is a functional definition, not a semantic one.
Types of “Change” That Trigger Retraining
1. Change in Job Assignments
This is broader than promotions or job title changes.
Examples:
A maintenance technician moves from stamping presses to robotic cells
A production operator becomes temporarily responsible for clearing jams
An employee is assigned to a different department for a shift
Even temporary assignments can trigger retraining if the employee is exposed to:
Different energy sources
Different isolation points
Different procedures
2. Change in Machines, Equipment, or Processes
The regulation is specific: retraining is required when the change “presents a new hazard.”
New Equipment (Clearly Different)
Retraining is required when:
New energy sources are introduced (e.g., hydraulics added to an electric system)
Isolation methods differ
Lockout points are different
New Equipment (Similar to Existing Equipment)
This is where many programs fail.
OSHA’s interpretation clarifies that even similar equipment often triggers retraining because:
Procedures may differ
Isolation locations may differ
Sequence steps may differ
Example:
Installing a new CNC machine that is “similar” but has:
Additional stored energy (spring-loaded system)
Different disconnect location
This still requires retraining because the procedure is not identical.
3. Change in Energy Control Procedures
Any modification to a written LOTO procedure triggers retraining.
Examples:
Adding a verification step
Changing lock placement locations
Revising sequence steps
Updating group lockout procedures
Even minor procedural revisions require retraining if they affect how employees perform LOTO.
Special Case: Loaned Employees (One-Day Assignment)
This is a common operational scenario.
Regulatory Analysis
If an employee is loaned to another department:
That is a change in job assignment
Retraining is required if the hazards or procedures differ
Practical Regulatory Conclusion
If the employee will interact with equipment requiring LOTO:
They must be trained on the specific energy control procedures they will encounter
If they are only “affected employees”:
They must understand the purpose and use of the procedures in that area
OSHA requires that training ensure employees have the knowledge and skills necessary for safe application of energy control
This is not optional based on duration. A one-day assignment does not exempt the employer.
Installation of New Equipment
Scenario 1: Entirely New Equipment Type
Retraining is required because:
New hazards exist
New procedures are introduced
This is a straightforward trigger under:
“Change in machines… that present a new hazard”
Scenario 2: Similar Equipment Installed
This is more nuanced.
Even if hazards are similar, retraining is still required when:
Procedures differ
Lockout points differ
Sequence differs
OSHA explicitly states that changes in equipment typically result in:
Changes in job assignments or procedures
Which require retraining
Bottom line:
“Similar” does not mean “no retraining required.”
What Is Actually Required for Retraining?
This is where many programs overcomplicate things—or misunderstand the minimum requirement.
OSHA’s Requirement
Retraining must:
Reestablish employee proficiency
Introduce new or revised control methods and procedures
There is no prescribed format in the regulation.
Does OSHA Require Hands-On Training?
OSHA does not explicitly require:
Classroom training
Hands-on demonstration
Formal testing
However, OSHA does require that training be effective, meaning:
Authorized employees must have:
Knowledge of energy sources
Understanding of magnitude
Ability to apply isolation methods
Regulatory Implication
If reviewing procedures alone does not ensure proficiency, it would not meet the standard.
But the regulation itself does not mandate a specific delivery method.
Is Reviewing the Procedure Enough?
It depends on whether that review:
Reestablishes proficiency
Covers the new or changed elements
From a strict regulatory standpoint:
If a change is minor and a procedure review fully addresses it, that can satisfy the requirement
If the change impacts execution, a simple review may not be sufficient to demonstrate proficiency
The key requirement is outcome-based:
Employees must be capable of performing the procedure correctly.
Documentation Requirement
OSHA requires certification that training occurred:
Employee name
Date of training
There is no requirement to document:
Training duration
Training method
Instructor
Key Takeaways
Retraining is event-driven, not time-driven
A “change” occurs whenever employee knowledge or procedures are no longer identical
Temporary assignments can trigger retraining
“Similar equipment” still often requires retraining
OSHA does not mandate classroom or hands-on training—but requires effective proficiency
Reviewing procedures may be sufficient—but only if it restores competency
Final Perspective
The regulatory intent is clear:
Retraining is not about checking a box. It is about ensuring that when something changes, employee capability changes with it.
Under 1910.147(c)(7)(iii)(A), the question is not:
“Did we retrain?”
The real compliance question is:
“Did the employee’s knowledge evolve to match the change?”
