Section 4(4) in Punjab General Sales Tax (Deferment and Exemption) Rules, 1991
(4)The expansion or modernisation or both parts of a unit shall be taken into account for the purpose of determining the deferment of, or exemption from the liability to pay tax under the Act, provided that a separate account for the additional and incremental production resulting from such expansion or modernisation or both is maintained.Explanation. - "Incremental production" in relation to expansion or modernisation shall mean production over and above either the installed capacity or actual production before expansion or modernisation, whichever is more.
