What is a requirement for self-service motor fuel dispensing facilities regarding staff presence?

The requirement for self-service motor fuel dispensing facilities mandates that staff must be present while the station is open to ensure safety and compliance with regulations. This presence is crucial as it allows for immediate assistance in the event of any issues, such as emergencies or accidents, which can arise when customers are dispensing fuel themselves. Additionally, staff presence helps enforce safety protocols, prevents potential misuse of equipment, and assures that the dispensing process is being conducted in accordance with environmental and safety regulations. By having staff available at all times when the service station operates, the facility can enhance customer safety and reduce the risk of hazardous incidents.