I concur with JT that the NSWFB do not recommend the installation of security screen doors, and that the purpose of the security screen door that VW proposes i.e. ventilation, would be deemed to be a non compliant purpose for local Councils.
However, if VW was to assure the OC that he/she would follow the information guide from NSWFB and not leave the door open for ventilation purposes and install a single locking door then the OC should not reasonably be able to refuse the request.
It appears that precedents have been set in the building if other security doors are already in existence in the apartment buildings. If the issue of security doors and fire safety was of great concern to the OC then I would have thought that it would be mandatory for all other security doors to be removed.
All that being said, fire safety should be a top priority, as JT has alluded to.