Section 5(2)(b) in The Standard of Weights and Measures (Approval of Models) Rules, 1987
(b)a document describing the following, namely:-(i)the principles of construction and the method of operation of the weight or measure;(ii)the safety devices provided to prevent any fraudulent or inaccurate operation of the weight or measure;(iii)the manner in which and the extent to which the weight or measure may be adjusted or corrected;(iv)the place where the verification stamp or seal, or both, may be affixed;(v)plans of general arrangements and installations drawings of the weight or measure and, where necessary, detailed installation instructions;(vi)[ two photographs of the model clearly indicating the mandatory declarations to be included as a part of the certificate of approval of the model; [ Substituted by G.S.R. 492(E), dated 24-5-2000 (w.e.f. 8-8-2000).](vii)actual circuit diagram (for digital type);(viii)place/places on the instrument where the verification stamp or seal or both have to be applied to prevent fraudulent practices;(ix)copies of the user 's manual, printed pamphlets and other literatures;(x)any other information which the applicant may consider to be useful for assessing the performance, and facilitating the approval of the model. ]