When the caller says Tandem, move vertically closer to the other dancer in your Tandem unit. If you find that you have to move a long way in order to get close, then your squares are probably too far apart and you should try to dance in tighter formations. EN: 30

Typically, the trailing dancer places a hand on the back or shoulder of the lead dancer. This helps keep the unit connected together. The Japanese style is for the lead dancer to place their arms comfortably at their side and slightly behind them, extending their hands palms up and toward the trailing dancer behind while the trailing dancer places their hands in the leading dancer's palms. In either case, the idea is to physically connect the dancers so that they stay together as a unit. At a minimum, the Trailer should tap the Leader's shoulder to let the Leader know that the Tandem unit is ready. EN: 40

When doing Arm Turns with another Tandem Unit, the Leader of each Tandem unit can join hands with the Trailer of the other unit. Tandem Arm Turns feel like Box Counter Rotates. EN: 50

As with an As Couples unit, no dancers should ever come between the dancers within a Tandem unit. EN: 60