law: 85. Power to take evidence, summon witness, etc.-
  (1) Every revenue officer not lower in rank than a sub-deputy collector acting as a revenue court shall have power to take evidence and to summon any person whose attendance he considers necessary, either as a party or as a witness or to produce any document, for the purpose of any inquiry which such officer is legally empowered to make; and all persons so summoned shall be bound to attend either in person or by an authorised agent as such officer may direct, and to produce such documents as may be required.
  (2) Every summons shall be in writing, signed and sealed by the officer issuing it and shall be in such form and be served in such manner as may be prescribed.