Section 12 in The Legal Metrology (Approval of Models) Rules, 2011
12. Mark of approval.
(1)The mark assigned to the model shall contain the national identification letters, namely, IND, the last two digits of the year of the issue (for example, 77), the code number assigned to the laboratory and the code number assigned to the model.(2)The mark assigned to the approved model shall be clearly and legibly affixed at such place of the model as may be specified in the certificate of approval and also on each weight or measure produced by the maker or manufacturer in accordance with the approved model:Provided that if the approved model of the Weight or measure conforming to such model is such that the mark assigned to the approved model cannot be affixed on it (for example, where it is fragile or too small), that mark may be associated with the conditions specified in the certificate of approval:Provided further that, where the approval is of a limited character, the mark of approval shall be accompanied by a special mark indicating the limitations of the approval and different special marks may be made for different limitations.
