20:81:04:07Knockdowns.

The mandatory eight count after a knockdown is standard procedure in all bouts. A boxer who had been knocked down cannot be saved by the bell in any round. A referee shall rule a knockdown when, as a result of a legal blow or series of legal blows, a contestant: (1) Touches the floor with any part of the body other than the feet; (2) Is being held up by the ropes; or (3) Is hanging on, through, or over the ropes without the ability to protect himself and cannot fall to the floor.

Source: 41 SDR 7, effective July 28, 2014.