A notice given by a tenant under section 42 shall be of no effect if on the relevant date—
A notice given by a tenant under section 42 shall cease to have effect if, before a new lease is entered into in pursuance of it, any such person or body of persons as is mentioned in subsection (1) serves or serve notice to treat as mentioned in that subsection.
Where subsection (2) applies in relation to a notice given by a tenant under section 42, then on the occasion of the compulsory acquisition in question the compensation payable in respect of any interest in the tenant's flat (whether or not the one to which the relevant notice to treat relates) shall be determined on the basis of the value of the interest subject to and with the benefit of the rights and obligations arising from the tenant's notice and affecting that interest.