Section 82 of Evidence Act "Presumption as to document admissible in England without proof of seal or signature"
When any document is produced before any Court, purporting to be a document which, by the law in force for the time being in England or Ireland, would be admissible in proof of any particular in any Court of justice in England or Ireland, without proof of the seal or stamp or signature authenticating it, or of the judicial or official character claimed by the person by whom it purports to be signed, the Court shall presume that such seal, stamp or signature is genuine, and that the person signing it held, at the time when he signed it, the judicial or official character which he claims, and the document shall be admissible for the same purpose for which it would be admissible in England or Ireland.
The Court shall presume that maps or plans purporting to be made by the authority of 61[ the Central Government or any State Government ] were so made, and are accurate; but maps or plans made for the purposes of any cause must be proved to be accurate.