shall apply to all individuals who are arrested or served with a summons on or after the date of expiration of the twelve-calendar-month period following July 1, 1975; and

shall commence to run on such date of expiration to all individuals who are arrested or served with a summons prior to the date of expiration of such twelve-calendar-month period, in connection with the commission of an offense, and with respect to which offense no information or indictment has been filed prior to such date of expiration.