From a 1/4 tag: Cross Extend; Trade; Extend. From a box circulate: Trailers Cross Extend and Trade as Leaders Fold; all Extend. From both formations the call is equivalent to all U-Turn Back. Similar to Burleson 1021 but different, so don't be misled.
This definition is from SCVSDA Note Service by Bill Davis.
It is provided here for informational and educational purposes only.