72.—(1) Where—

(a) section 70 applies,

(b) the notice of termination of the head-tenancy does not require the termination of the sub-tenancy, and

(c) no dispute in relation to the termination of the head-tenancy is referred under Part 6 to the Board,

the head-tenant must, within 28 days from the receipt of that notice, notify the sub-tenant of the contents of that notice.

(2) Where—

(a) section 70 applies,

(b) the notice of termination of the head-tenancy does not require the termination of the sub-tenancy, and

(c) a dispute in relation to the termination of the head-tenancy is referred under Part 6 to the Board,

the head-tenant must, within 28 days from the receipt of that notice, notify the sub-tenant—

(i) of the contents of that notice, and

(ii) of the fact that that dispute has been referred to the Board.

(3) The particulars of the determination order (if any) made by the Board on foot of that reference must be notified by the head-tenant to the sub-tenant within 14 days from the receipt by the head-tenant of the order.

(4) “Head-tenancy”, “head-tenant”, “sub-tenancy” and “sub-tenant” in this section shall be construed in accordance with section 70.