The day to day management of trials is carried by the contractors who have successfully tendered for the various work packages. Each contractor is represented on the Trials Technical Group (TTG), which reports to the Board. The TTG is responsible for ensuring that the procedures are reviewed each year and that any changes endorsed by the Board.
APHA are responsible for the Varietal Listing of new varieties. This is a legal requirement for all main crops and ensures that a variety is genuinely new and an improvement. New varieties must be distinct, uniform and stable (DUS) and, for agricultural crops, provide satisfactory value for cultivation and use (VCU).
The VL is carried out separately to the RL trials. BSPB has the contract for the work, which is funded by the breeders. Results of the harvested VL trials are used along with the RL results to produce the RL.