Where a person other than a Collector, or than a guardian appointed by will or other instrument, has been appointed or declared by the Court to be guardian of the property of a ward, he shall not, without the previous permission of the Court,--
         (a) mortgage or charge, or transfer by sale, gift, exchange or otherwise, any part of the immovable property of his ward, or
         (b) lease any part of that property for a term exceeding five years or for any term extending more than one year beyond the date on which the ward will cease to be a minor.