 The words 'shall afford the defendant an opportunity to make a statement in his own behalf' seem to connote a different and more extensive procedure than exists when 'a defendant' moves, requests or acts, under the other rules.  Cf. Fed.R.Crim.P. 00(a), 00, 00(b), 00(a), 00(b), 00(b), 00, 00(a) and 00(d).