The sport that has regulations for player contact is football (known as soccer in some regions). Rules of engagement dictate how players can interact with opponents, placing emphasis on safe and fair play. Players can use shoulder-to-shoulder contact within the guidelines of the game, while dangerous tackles or aggressive maneuvers are penalized with fouls and yellow or red cards. This framework is essential for maintaining the sport's integrity and safety, allowing for competitive yet controlled play. Understanding these regulations is crucial for players at all levels to navigate games effectively.