Patents Ordinance, 2000 — section 52

52. Evidence before Controller. Subject to any rules made in this behalf, in any proceedings under this Ordinance 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.