# Rule 2 (A.A.U. Four-Wall Rules, 1923, historical)

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

Ball shall be standard rubber handball. (Spalding's No. 101 ball is used in the national championship tournaments.)

## Mentioned here

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

How this rule changed: [wording in every rulebook](https://handball.theperfectship.com/rulebooks/clause-history/code-fourwall-american/2.md)

Rulebook: [A.A.U. Four-Wall Rules, 1923](https://handball.theperfectship.com/rulebooks/aau-fourwall-1923.md)

Source: Spalding's Official Handball Guide, 1923, ed. Robert L. Ripley (Library of Congress, LCCN 23002979), pp. 69-72; also printed in the Official Handbook of the A.A.U., 1923, section LXI. Public domain.