If the tenancy becomes the subject of a valid notice to quit given on or after the date of the giving of the retirement notice (but before the Tribunal have begun to hear any application by the nominated successor under section 53 below in respect of the retirement notice) and the notice to quit—
the retirement notice shall be of no effect and no proceedings, or (as the case may be) no further proceedings, shall be taken under this Part of this Act in respect of it.
If the tenancy becomes the subject of a valid notice to quit given on or after the date of the giving of the retirement notice (but before the Tribunal have begun to hear any application by the nominated successor under section 53 below in respect of the retirement notice) and the notice to quit—
the retirement notice shall be of no effect and no proceedings, or (as the case may be) no further proceedings, shall be taken under this Part of this Act in respect of it unless one of the events mentioned in subsection (3) below occurs.
Those events are as follows—
Where—
that period shall for those purposes expire at the end of the period of one month beginning with the date on which the arbitrator's award is delivered to the tenant, with the date of the Tribunal's decision to withhold consent, or with the expiry of the said period for making an application (as the case may be).
For the purposes of this Part of this Act an application by the nominated successor under section 53 below which is invalidated by subsection (1) or (2) above shall be treated as if it had never been made.