1. If the particle size of the specified risk material to be rendered is more than 30 millimetres, the specified risk material shall be reduced in size using equipment specified in the licence, set so that the particle size after reduction is no greater than 30 millimetres or such smaller size as the licence shall specify. The effectiveness of the equipment shall be checked daily and its condition recorded. If checks disclose the existence of particles larger than is permitted in the licence, the process shall be stopped and repairs made before the process is resumed.
2. After reduction the specified risk material shall be placed in a vessel with added fat and heated to a core temperature greater than 100°C for at least 16 minutes, a core temperature greater than 110°C for at least 13 minutes, a core temperature greater than 120°C for at least 8 minutes and a core temperature greater than 130°C for at least 3 minutes.
3. The rendering may be carried out in batch or continuous systems.
4. The specified risk material may be cooked such that the time-temperature requirements are achieved at the same time.