Raymond regulations state that the operator should always remain inside the compartment at all times, even when wearing a five-point harness.

OSHA regulations support the manufacturer’s guidelines stating that the operator should remain in the operator’s compartment at all times, but there is no specific rule prohibiting it. OSHA does state prior written approval by the manufacturer is required for any modifications and additions that affect capacity and safe operation.

See:
1910.178(a)(4)
Modifications and additions which affect capacity and safe operation shall not be performed by the customer or user without manufacturers prior written approval. Capacity, operation, and maintenance instruction plates, tags, or decals shall be changed accordingly.