Section 3. Except in case of urgent necessity, no prisoner shall be put in irons or under mechanical restraint

53. Except in case of urgent necessity, no prisoner shall be put in irons or under mechanical restraint by the Gaoler of his own authority, and notice thereof shall be forthwith given to the Superintendent. Except in case of urgent necessity, no prisoner shall be kept in irons or under mechanical restraint for more than twenty-four hours, without an order in writing from the Superintendent specifying the cause thereof, and the time during which the prisoner is to be kept in irons or under mechanical restraint. Such order shall be kept by the Gaoler as his warrant. 3. —Criminal prisoners before trial shall be kept apart from convicted prisoners.