Production of witnesses

The parties shall produce their witnesses on the day of the trial; and if either party requires assistance to procure the attendance of a witness on such day, either to give evidence or to produce a document, he shall apply to the Deputy Commissioner in sufficient time before such day to enable the witness to be summoned and to attend on that day; and, if the application be made in sufficient time as aforesaid, the Deputy Commissioner shall issue a summon requiring such witness to attend.