(e) When GSE is being moved in close proximity to the aircraft, and when the vision of the GSE operator is or might be restricted, the GSE operator must: be;
1. Guided by a guide person using standard IATA signals, and/or
2. assisted by means of a suitable camera system or mirror.
3. If visual contact with the guide person(s) is lost, the GSE operator must stop movement of the GSE immediately