Where in pursuance of this Part a conveyance or grant is executed by a local authority . . . or a housing association ("the landlord") of a dwelling-house situated in—
the conveyance or grant may (subject to section 156A(8) contain a covenant limiting the freedom of the tenant (including any successor in title of his and any person deriving title under him or such a successor) to dispose of the dwelling-house in the manner specified below.
The limitation is, . . . ), that until such time (if any) as may be notified in writing by the landlord to the tenant or a successor in title of his
The condition is that the person to whom the disposal is made (or, if it is made to more than one person, at least one of them) has, thoughout the period of three years immediately preceding the application for consent or, in the case of a disposal by way of tenancy or licence, preceding the disposal—
or has had the one in part or parts of that period and the other in the remainder; but the region need not have been the same throughout the period.
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A disposal in breach of such a covenant as is mentioned in subsection (1) is void and, so far as it relates to disposals by way of tenancy or licence, such a covenant may be enforced by the landlord as if—
Any reference in the preceding provisions of this section to a disposal by way of tenancy or licence does not include a reference to a relevant disposal or an exempted disposal.
Where such a covenant imposes the limitation specified in subsection (2), the limitation is a local land charge and the Chief Land Registrar shall enter a restriction in the register of title reflecting the limitation.
An order under this section—