Section 79 of the Indian Patents Act 1970
Section 79 of the Indian Patents Act 1970 is about Evidence how to be given and powers of Controller in respect thereof. It is under CHAPTER XV of the Act. CHAPTER XV is titled POWERS OF CONTROLLER GENERALLY.
Subject to any rules made in this behalf, in any proceeding under this Act before the Controller, evidence shall be given by affidavit in the absence of directions by the Controller to the contrary, but in any case in which the Controller thinks it right so to do, he may take oral evidence in lieu of, or in addition to, evidence by affidavit, or may allow any party to be cross-examined on the contents of his affidavit.
See also:
Section 78 Indian Patents Act 1970 (Power of Controller to correct clerical errors, etc.)