The house is held for the purpose of being available for occupation by a minister or a full-time lay missionary of any religious denomination as a residence from which to perform the duties of his office and—
(a)not later than the beginning of the tenancy the landlord (or, where there are joint landlords, any of them) gave notice in writing to the tenant that possession might be recovered on this ground; and
(b)the sheriff is satisfied that the house is required for occupation by such a minister or missionary as such a residence.