Which items are generally prohibited on the airside without prior approval?

The correct choice highlights the importance of strict security measures on the airside to ensure the safety and security of airport operations. Unpermitted tools, weapons, and outside food or drink pose potential risks as they could be misused or distract personnel, leading to safety hazards. The airside environment has specific regulations to minimize risks associated with unauthorized items, ensuring that only essential and approved materials are present in this sensitive area.

The other items mentioned are often either essential for emergency situations or safety regulations and therefore may not require prior approval to be used on the airside. For instance, medical supplies and oxygen tanks, as well as emergency equipment and first aid kits, are crucial for health and safety. Safety vests and helmets are standard safety gear, necessary for protecting personnel while working in potentially hazardous conditions on the airside.