699. Periods of non-residence to be disregarded.

In determining whether the requirement that the landlord should be resident in the same building constantly since the date of grant of the tenancy1 is fulfilled, the following periods are to be disregarded:


    (1)     any period of not more than 28 days beginning with the date on which the landlord's interest under the tenancy becomes vested at law and in equity in an individual who, during that period, does not occupy as his residence another dwelling house which forms part of the building or, as the case may be, flat concerned2;


    (2)     if, within a period falling within head