Section 1 Proprietors of entailed estates may grant tacks for 14 years, and one existing life; or for 2 lives, and life of survivor; or for 31 years.

It shall and may be lawful to every proprietor of an entailed estate within . . . F1 Scotland, to grant tacks or leases of all or any part or parts thereof for any number of years not exceeding fourteen years from the term of Whitsunday next after the date thereof, and for the life of one person to be named in such tacks or leases, and in being at the time of making thereof; or for the lives of two persons to be named therein, and in being at the time of making the same, and the life of the survivor of them; or for any number of years not exceeding thirty-one years from the term aforesaid.