original: The administration of the port is carried out by the Karachi Port Trust which was established in the nineteenth century.
simplifications: The administration is carried out by the 19th century Karachi Port Trust. the Karachi Port Trust manages the port. It was established in the nineteenth century. The port is maintained by the Karachi Port Trust which started in the nineteenth century. The port is run by the Karachi Port Trust, which was created in the nineteenth century. The Karachi Port Trust runs the port. It was made in the 1800s. The Karachi Port Trust is in charge of the port. The port's administration is handled by the Karachi Port Trust. The Karachi Port Trust was formed in the nineteenth century. Established in the 19th century, The Karachi Port Trust oversees the port. The Karachi Port Trust manages the port.  The  Karachi Port Trust which was set up in the nineteenth century. The administration of the port shall be carried out by the Karachi Port Trust, established in the nineteenth century.