#25864
Sir Humphrey
Strataguru

    Generally, building features only have to comply with the standards that applied when they were constructed. However, renovation or substantial maintenance has to comply with current standards. I don’t know if this balcony is original or whether it would have complied in 1983. 

    Is it possible that all other 36 balustrades have been replaced?  Or, is it possible this one balustrade was replaced but not to the standard?

    Perhaps balustrades were replaced because they were dangerous in some way other than not meeting the standard (say, rusted or rotten or loose or whatever). Then the replacements would have had to meet the standard even though that was not the reason for replacing them.