1110. General prohibition on assignment.

An introductory tenancy1 is not capable of being assigned except in the cases mentioned in heads (1) and (2) below2; and this prohibition also applies to a tenancy which is not an introductory tenancy but would be if the tenant3 (or, where the tenancy is a joint tenancy, at least one of the tenants) were occupying or continuing to occupy the dwelling house4 as his only or principal home5. Accordingly, for these purposes, valid assignments are: