Section 12(2) in The Punjab State Agricultural Marketing Board (Engineering Wing) Execution of Works Rules, 1979
(2)If during the course of actual execution of a work any variation in the quantities of various items provided in the sanctioned estimate becomes essential, the Executive Engineer shall be competent to approve the same, provided the overall expenditure remains within the permissible limits. However, any deviation in the design or specifications of any item, shall require prior approval of the Chief Engineer.
