Determination of liability to pay tax

6 : Determination of liability to pay tax (1) The Commissioner shall, in the prescribed manner, institute proceedings for the purpose of determining the liability of a dealer to pay tax under this Act. Such liability shall be determined by an order and such determination shall be made within a period of twelve months from the date of institution of such proceedings. (2) Notwithstanding anything contained in sub-section (2) of Section 5, liability of a dealer to pay tax under this Act shall not be determined from a date earlier than five years prior to - (i)the date of institution of proceedings under sub-section (1); or (ii) the date of validity of the registration certificate, whichever is earlier.