4. Transfer of immature contract to Government of Nepal :
If the last date of a contract previously arranged by a Birta-holder has not expired by the date of the commencement of this Act, such a contract shall be transferred to the Government of Nepal. Provided that, if it appears or is proved that the contract has not been duly made or if the period of the contract has been so specified as
to exceed Three years, such a contract shall not be valid.