This document summarizes the rules for an intramural 5 on 5 basketball league. It outlines general rules such as teams needing a minimum of 4 players to start, games consisting of two 20 minute halves, and mercy rule if a team is winning by 30 points or more in the second half. It also discusses specific rules around dunking, substitutions, fouls and free throws, unsportsmanlike conduct, and interactions with officials.