In what scenario may personnel be allowed to not wear seat belts in the mobile water supply apparatus?

Personnel may be allowed to not wear seat belts in a mobile water supply apparatus when loading hose back onto the apparatus. This scenario typically occurs when the vehicle is stationary and operational activities, such as loading or unloading equipment, are being conducted. During these activities, it is important for personnel to have the freedom of movement necessary to safely and efficiently secure equipment, such as hoses, without the restriction that a seat belt would impose.

In contrast, during high-speed pursuits, the law and safety protocols usually require that all occupants wear seat belts to minimize injury risks in the event of an accident. When an apparatus is parked, seat belt usage is generally not enforced, but the primary reason for reduced belt use still hinges on the context of operation rather than routine safety protocol. Similarly, while conducting inspections, depending on the context and environment, seat belts might still be advised for safety, especially if the vehicle is running or moving between different sites.

Thus, loading hose back onto the apparatus allows for a specific operational context where safety measures are balanced with the need for personnel to perform their tasks effectively.