What type of leashes must falconers use according to the equipment requirements?

Falconers are required to use leashes that are flexible and weather-resistant to ensure the safety and wellbeing of their birds. Flexibility in the leash allows for better mobility and comfort for the bird, enabling it to move naturally during flight and while on the perch. Moreover, weather resistance is crucial because falconry often takes place outdoors, where leashes are exposed to various environmental conditions. A leash that can withstand weather elements such as rain, humidity, and sun without deteriorating ensures longevity and reliability in the field. The other options do not adequately address the need for both flexibility and weather resistance, which are essential considerations in maintaining the health and safety of the falcon.