Section 3(2)(f) in West Bengal Building (Regulation of Promotion of Construction and Transfer by Promoters), Act, 1993
(f)sanctioned plan for the construction of building under any law for the time being in force or, where the plan is not sanctioned at the time of making the application under sub-section (1), an undertaking by the applicant to the effect that the plan will be submitted by him as soon as it is sanctioned: