a securement arrangement for a seat belt closure of a three - point seat belt system in a vehicle comprises an anchor piece secured to the vehicle , a closure body , and a generally u - shaped closure body retaining assembly for mounting the closure body on the anchor piece . a spring disposed between a pair of u - forming legs of the closure body retaining assembly biases the closure body into its home position . a contact element emits a signal to be processed by an onboard signal processing unit when the closure body , due to the application thereto of a load imposed by the seat belt , is displaced so as to overcome the biasing force of the spring . the contact element correspondingly moves out of contact and emits a signal in response to its movement out of contact .