The ACC will not be able to experiment with helmet cams and coach-quarterback communications systems this season, has learned. The rules committee turned down the conference's request in June based, in part, on the timing. The committee said the late request didn't the committee didn't have time for a proper discussion. Miami linebacker Denzel Perryman wore a helmet cam in the Hurricanes' spring game. The ACC will be allowed to experiment with biometric systems this season. The most common is the Catapult system, a biofeedback vest that Jimbo Fisher credits for contributing to last year's national championship. ACC commissioner John Swofford is expected to address the rules issues Sunday in his state of the conference address to open the ACC media days. The intent is to “record, document and measure data on head contacts,” although the Catapult system measures much, much more. Fisher uses data to tailor practices and measure the health of individual players. The NCAA allows the biometric vests as long as there was one-way communication and the data was used for only health and safety.