From Back-to-Back Couples.
Belles Right-face U-Turn Back as Beaus 1/2 Box Circulate & Roll; all
Extend to the given fractional Tag formation. If no
fraction is given, complete a full Tag The Line. EN: 391
Chase The Tag is the same as Vertical Tag The Line [C1] except that
it must start from Back-to-Back Couples, and that the Belles turn to the
Right instead of to the Left. EN: 65