a. The outgoing swimmer will watch the incoming swimmer and initiate the
start before the incoming swimmer has actually touched (usually as the
incoming swimmer starts the recovery of the stroke that is going to touch
the wall).

b. The swimmer will leave the side when the incoming swimmer touches
the wall.

c. There will not be a large time difference between the incoming swimmer
touching and the outgoing swimmer's feet leaving the side (under 0.5
seconds is recommended).

d. The outgoing swimmer will perform front crawl.

All starts should be from the poolside and not a starting block.