The benefit and burden of all landlord and tenant covenants of a tenancy—
Where the assignment is by the tenant under the tenancy, then as from the assignment the assignee—
Where the assignment is by the landlord under the tenancy, then as from the assignment the assignee—
In determining for the purposes of subsection (2) or (3) whether any covenant bound the assignor immediately before the assignment, any waiver or release of the covenant which (in whatever terms) is expressed to be personal to the assignor shall be disregarded.
Any landlord or tenant covenant of a tenancy which is restrictive of the user of land shall, as well as being capable of enforcement against an assignee, be capable of being enforced against any other person who is the owner or occupier of any demised premises to which the covenant relates, even though there is no express provision in the tenancy to that effect.
Nothing in this section shall operate—
To the extent that there remains in force any rule of law by virtue of which the burden of a covenant whose subject matter is not in existence at the time when it is made does not run with the land affected unless the covenantor covenants on behalf of himself and his assigns, that rule of law is hereby abolished in relation to tenancies.