Most North American regulatory authorities mandate that an operator be re-trained and certified every three years. Re-training and certification is also required 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.
- A performance evaluation reveals that the operator is not operating the truck safely.
- The operator is assigned a different type of truck.
- Workplace conditions change (e.g., different terrain), which could affect the safe operation of the lift truck.