Where a dwelling which would not otherwise be overcrowded becomes overcrowded by reason of a child attaining the age of one or ten, then if the occupier—
applies to the local housing authority for suitable alternative accommodation, or
has so applied before the date when the child attained the age in question,
he does not commit an offence under section 327 (occupier causing or permitting overcrowding), so long as the condition in subsection (2) is met and the occupier does not fail to take action in the circumstances specified in subsection (3).
The condition is that all the persons sleeping in the dwelling are persons who were living there when the child attained that age and thereafter continuously live there, or children born after that date of any of those persons.
The exception provided by this section ceases to apply if—
suitable alternative accommodation is offered to the occupier on or after the date on which the child attains that age, or, if he has applied before that date, is offered at any time after the application, and he fails to accept it, or
the removal from the dwelling of some person not a member of the occupier's family is on that date or thereafter becomes reasonably practicable having regard to all the circumstances (including the availability of suitable alternative accommodation for that person and the occupier fails to require his removal.