(2)Notwithstanding that any immoveable property vest in a district panchayat, on lease, sale or other transfer thereof shall be valid unless it has been made with the previous sanction of the competent authority:Provided that in the case of a lease of immoveable property other than the property referred to in clause (b) of sub-section (1), on such previous sanction shall be necessary, if the period of lease does not exceed three years.