The standard does not require any specific frequency of refresher training, but refresher training must be provided when:
- The operator has been observed to operate the vehicle in an unsafe manner.
- The operator has been involved in an accident or near-miss incident.
- The operator has received an evaluation that reveals that the operator is not operating the truck safely.
- The operator is assigned to drive a different type of truck.
- A condition in the workplace changes in a manner that could affect safety operation of the truck.
However, OSHA does state that “An evaluation of each powered industrial truck operator’s performance shall be conducted at least once every three years.”