What is the consequence of an illegal substitution?

An illegal substitution results in a 5-yard penalty from the previous spot. This situation commonly occurs when a team fails to properly substitute players during the game, such as not allowing enough time for the players to enter or exit the field or exceeding the allowed number of players on the field at the time of the snap. The 5-yard penalty is designed to maintain the flow of the game and enforce the rules regarding player substitutions. By penalizing the offending team, the rules help ensure that all players and coaches adhere to the established guidelines, promoting fair play and safety on the field.