The attorney for the Commonwealth shall file a Notice of Aggravating Circumstances that the Commonwealth intends to submit at the sentencing hearing and contemporaneously provide the defendant with a copy of such Notice of Aggravating Circumstances. Notice shall be filed at or before the time of arraignment, unless the attorney for the Commonwealth becomes aware of the existence of an aggravating circumstance after arraignment or the time for filing is extended by the court for cause shown.
234 Pa. Code r. 802