# Rule 21 (A.A.U. One-Wall Rules, 1931, historical)

> **Historical rulebook: not the current rules.** The current rules are here: https://handball.theperfectship.com/rules/one-wall/

Hitting a partner with the ball immediately puts the ball out of play and it is charged against that side.

## Mentioned here

- [Partner](https://handball.theperfectship.com/partner.md)
- [Ball](https://handball.theperfectship.com/ball.md)

How this rule changed: [wording in every rulebook](https://handball.theperfectship.com/rulebooks/clause-history/code-onewall-smallball/21.md)

## Relationships

- Partner relates to Ball: mentioned together in 5 sub-rules.

Rulebook: [A.A.U. One-Wall Rules, 1931](https://handball.theperfectship.com/rulebooks/aau-onewall-1931.md)

Source: Charles J. O'Connell, How to Play Handball ... Including Official Rules for Play and Diagrams of Court Construction (New York: American Sports Publishing Company, copyright 1931; Spalding's 'Red Cover' Series of Athletic Handbooks No. 114R), pp. 97-100; Ohio State University copy (HathiTrust osu.32435007267735), page screenshots saved by the user from HathiTrust's viewer. Public domain in the US.