Section 12(1)(k) in West Bengal Municipal (Building) Rules, 2007
(k)where structural design or soil stability and similar other tests are necessary for a building under any provision of these rules, the copy of details of reports and/or recommendations of soil stability or other tests and/or copy of details of calculations for structural design duly signed by the competent personnel as specified in rule 15 or rule 161 (for Municipalities in hill areas).