137. Withdrawal and replacement of notices
(1) A notice under section 135 is replaced if the landlord serves another notice on the same sub-tenant for a notified amount covering the same rent or part of that rent.
(2) A notice under section 135 served on one sub-tenant is also replaced if —
(a) the landlord serves a notice on another sub-tenant for a notified amount covering the same rent or part of that rent; and
(b) in relation any of the premises comprised in the first sub-tenant's sublease, the second sub-tenant is an inferior or superior sub-tenant.
(3) The landlord must withdraw a notice under section 135 if any of these happens —
(a) the notice is replaced;
(b) the notified amount is paid, unless it is paid wholly by the sub-tenant.