In collegiate American football, a specific rule penalizes players for contact that meets a precise set of criteria. This rule addresses forceful contact above the shoulders, specifically when a player makes contact with the crown of the helmet or targets the head or neck area of a defenseless opponent. A penalty is assessed if a player initiates contact with the helmet to the head or neck area of a defenseless opponent; or lowers their head and makes forceful contact with the crown of their helmet.
The implementation of this rule is intended to enhance player safety and reduce the risk of concussions and other serious head and neck injuries. Its introduction and subsequent modifications reflect an ongoing effort to balance the physicality of the sport with the well-being of the athletes involved. The rule has evolved over time, with ongoing refinements to clarify what constitutes a violation and to aid officials in making consistent judgments during gameplay. Reviews are often used to determine whether a penalty should stand or be overturned.