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(1)A landlord under a long lease of a dwelling may not serve a notice under section 146(1) of the Law of Property Act 1925 (c. 20) (restriction on forfeiture) in respect of a breach by a tenant of a covenant or condition in the lease unless subsection (2) is satisfied.
(2)This subsection is satisfied if—
(a)it has been finally determined on an application under subsection (4) that the breach has occurred,
(b)the tenant has admitted the breach, or
(c)a court in any proceedings, or an arbitral tribunal in proceedings pursuant to a post-dispute arbitration agreement, has finally determined that the breach has occurred.
(3)But a notice may not be served by virtue of subsection (2)(a) or (c) until after the end of the period of 14 days beginning with the day after that on which the final determination is made.
(4)A landlord under a long lease of a dwelling may make an application to a leasehold valuation tribunal for a determination that a breach of a covenant or condition in the lease has occurred.
(5)But a landlord may not make an application under subsection (4) in respect of a matter which—
(a)has been, or is to be, referred to arbitration pursuant to a post-dispute arbitration agreement to which the tenant is a party,
(b)has been the subject of determination by a court, or
(c)has been the subject of determination by an arbitral tribunal pursuant to a post-dispute arbitration agreement.