Handball
Rule

A.A.U. One-Wall Rules · American one-wall, small ball

Rule 2

HistoricalA.A.U. One-Wall Rules, 20 November 1922 (historical)

Historical rulebook: not the current rules. The current rules are here (USHA One-Wall Rulebook, as of 26 January 2025).

Ball to be standard rubber handball, Spalding No. 101, or similar thereto.

Mentioned here

How this rule changed

See the wording of this rule in every rulebook, with the changes marked.