Attorneys are permitted use of limited electronic devices, such as cellular telephones, pagers, PDAs, Blackberrys, iPhones, iPads, laptop computers, in the courthouses within the District. The recording of any audio, video or the taking of any photographs is not permitted while in the courthouse. Cellular telephones and pagers are to be programmed so as to not emit any audible noise while in the courtroom. PDAs, Blackberrys, iPhones, iPads and laptop computers may be used to assist attorneys in data entry or data display in furtherance of courtroom proceedings. The use of electronic devices for purposes of transmitting and/or receiving is not permitted while in the courtrooms. The use of electronic devices shall not be disruptive to court proceedings. Electronic devices are not permitted in the grand jury rooms while the grand jury is in session. Each judicial officer may modify this rule as the circumstances warrant. "