11.1(b)(A) if “Calculation Agent Adjustment” is specified in the related Confirmation as the consequence of any such Index Adjustment Event, then the Calculation Agent shall determine if such Index Adjustment Event has a material effect on the Index Transaction and, if so, shall calculate the relevant Settlement Price, Final Price, Strike Price, Forward Price, Forward Floor Price, Forward Cap Price, Knock-in Price or Knock-out Price, as the case may be, using, in lieu of a published level for that Index, the level for that Index as at that Valuation Date as determined by the Calculation Agent in accordance with the formula for and method of calculating that Index last in effect prior to the change, failure or cancellation, but using only those securities that comprised that Index immediately prior to that Index Adjustment Event;