Calculation of IT remuneration

Section 40 b(remuneration clause) of I.T Act has been amended by Finance Act 2009(2).

Q.1) How to compute the total remuneration allowable as on 31st March,2010 if new deed amending the remuneration clause has been registered with effect from 1/10/2009.

Q.2) If the assesse(firm) has a stamp paper with date prior to 01/10/2009 ie,befor passing of the Finance bill which made the  amendment can it claim remuneration from that date which is prior to the amendment.