Section 12(3)(b) in The Intellectual Property Appellate Board (Patents Procedure) Rules, 2010
(b)in any country or place outside India, before a diplomatic or consular officer, within the meaning of the Diplomatic and Consular Officers (Oaths and Fee) Act, 1948, or such country or place, or before a notary public, or before a Judge or a Magistrate, of the country or place.