12(1)The right to buy does not arise if the dwelling-house is held by the landlord on a tenancy from the Crown, unless—E+W
(a)the landlord is entitled to grant a lease in pursuance of this Part without the concurrence of the appropriate authority, or
(b)the appropriate authority notifies the landlord that as regards any Crown interest affected the authority will give its consent to the granting of such a lease.
(2)In this paragraph “tenancy from the Crown” means a tenancy of land in which there is a Crown interest superior to the tenancy, and “Crown interest” and “appropriate authority” mean respectively—
(a)an interest comprised in the Crown Estate, and the Crown Estate Commissioners or other government department having the management of the land in question;
(b)an interest belonging to Her Majesty in right of the Duchy of Lancaster, and the Chancellor of the Duchy;
(c)an interest belonging to the Duchy of Cornwall, and such person as the Duke of Cornwall or the possessor for the time being of the Duchy appoints;
(d)any other interest belonging to a government department or held on behalf of Her Majesty for the purposes of a government department, and that department.
(3)Section 179(1) (which renders ineffective certain provisions restricting the grant of leases under this Part) shall be disregarded for the purposes of sub-paragraph (1)(a).