# Rule 18 (A.A.U. Four-Wall Rules, 1931, historical)

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

Hitting a partner with the ball immediately puts the ball out of play and counts as a miss for that side, except during the service when the partner is standing with his back to the side wall as described in Rule 1.

## Mentioned here

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

How this rule changed: [wording in every rulebook](https://handball.theperfectship.com/rulebooks/clause-history/code-fourwall-american/18.md)

## Relationships

- Partner relates to Ball: mentioned together in 5 sub-rules.
- Partner relates to Wall: mentioned together in 2 sub-rules.
- Side wall relates to Ball: mentioned together in 3 sub-rules.
- Side wall relates to Wall: mentioned together in 3 sub-rules.
- Ball relates to Wall: mentioned together in 7 sub-rules.

Rulebook: [A.A.U. Four-Wall Rules, 1931](https://handball.theperfectship.com/rulebooks/aau-fourwall-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. 65-69; Ohio State University copy (HathiTrust osu.32435007267735), page screenshots saved by the user from HathiTrust's viewer. Public domain in the US.