and (b) (i) tenures and holdings not included in exception (a) above made, and (ii) other leases of land whether or not for purposes connected with agriculture or horticulture, existing at the date of issue of the notification for sale of the estate under this Act: Provided that notwithstanding anything contained in any law for the time being in force or in any lease or contract no person shall be entitled to hold under such a purchaser as is aforesaid any tenure holding or lease coming within exception (b) above made, free Of rent or at a low rent or at a rent or rate of rent fixed in perpetuity or for any specified period unless the right so to hold has been expressly recognised under any law for the time being in force by any competent civil or revenue court; and the purchaser shall be entitled to proceed in the manner prescribed; by any law for the time being in force for the 623 determination of a fair and equitable rent of such tenure, holding or lease.