From the Chairman of the WBF Systems Committee
We have been informed that the Belarus 2 Club and 2NT bids are B/S and have contacted them to tell them to change it as these bids are not permitted (this system has now been changed).
Please note, however, that we will not be policing every card.
Thus all NPCs are strongly advised to read the Conditions of Contest regarding systems and to check their players' cards, removing any Brown Sticker agreements.
Note that the penalties for using such conventions are very severe so all teams are advised to be very careful.