12. Whoever, having been sent to a leper asylum under an order of a Magistrate in Form C or Form D set forth in the schedule, escapes from, or leaves, the asylum without the permission in writing of the Superintendent thereof, may be arrested without a warrant by any police-officer or by any other person especially empowered by the Government by order in writing in this behalf, and upon arrest shall be forthwith taken back to the leper asylum.