And whereas the Restrictions contained in the said recited Act of the Thirty-fourth Year of His present Majesty as it now stands, may be found inconvenient in respect to the granting of Leases of some Kinds of Property now held under Lease from the Crown, and which are of a fluctuating and uncertain Value; be it therefore enacted, That it shall be lawful for the Lords Commissioners of the Treasury to grant and renew Leases of the Profits of Agistment of Forests disassorested, the Profits of Prae and Post, Fines arising within the Principality of Wales and County Palatine of Chester, thole of Lighthouses on Beacons, and of Chains for mooring Ships, Tolls, Markets and Fairs, Tythes, Fisheries, Ferries, and other Articles of uncertain Produce, for such Term of Years not exceeding Thirty-one Years, and for such Fine or Fines, and under such Rent or other Reservations and Conditions as they shall from Time to Time think reason-able and expedient.