Brown Sticker conventions and their permitted use are defined in the WBF Systems Policy

On the occasions when Brown Sticker Conventions are permitted (normally only for the Knock-Out phase of the Bermuda Bowl and Venice Cup), it is a requirement that Announcement Forms giving full details of the Convention together with a suggested Defense are provided at the same time as the Card is registered. No more than three Brown Sticker Conventions may be registered by a pair.

Separate forms are required depending on whether the Convention is an Opening Bid or an Overcall.