Abstract: The Safety Helmet Lockout System comprised of a safety helmet with a uniqely keyed system contained within its cranial webbing and chinstrap that has the ability to sense when said helmet is securely strapped upon the wearers head. The chinstrap contains a locking buckle which releases a uniqely keyed enabling key and/or a signal upon sensing that said safety helmet is securely strapped upon the wearers head. Several means of sensing are possible, but the preferred embodiment employs physio sensors located within the cranial webbing and chinstrap of said safety helmet. The locking buckle which is located on the chinstrap, releases said enabling key or signal after recieving signals from all the physio sensors, and sensing tension in the chinstrap. The released enabling key, or emitted signal, can then be used to access vehicles, sporting goods, industrial equipment, tools, passage locks, and the like.