USHA One-Wall Rules · American one-wall, small ball
Rule 1.2 Description
HistoricalUSHA One-Wall Rules, June 2006 (historical)
USHA rules text used with permission of the U.S. Handball Association (ushandball.org); credit: U.S. Handball Association. Source: ushandball.org
Handball is a competitive game in which either hand or either fist may be used to hit the ball.
Mentioned here
How this rule changed
See the wording of this rule in every rulebook, with the changes marked.