69.—Where—

(a) a lease (whether made before or after the commencement of this Act) of a tenement contains a covenant prohibiting or restricting the doing by the lessee of any particular thing without the licence or consent of the lessor, and

(b) the rent reserved by the lease has not been paid for five or more years, and

(c) the lessor is not known to and cannot be found by the lessee,

the Court may, on the application of the lessee and after the publication of such (if any) advertisements as the Court directs, authorise the lessee, subject to such (if any) conditions as the Court thinks fit to impose, to do the particular thing so prohibited or restricted and thereupon it shall be lawful for the lessee to do such particular thing without the licence or consent of the lessor, in accordance with the conditions (if any) so imposed.