Balcony Dreams – strata says 75% rule doesn’t apply?

Hi wise hive!

There are 15 apartments in the building, the front 10 all have balconies, the rear 5 do not. Four of us (rear owners) are keen to have balconies, only one is desisting. We would like to apply the 75% rule, but were advised by strata:

“You can’t force someone to pay for a balcony that they don’t own to pay for.

This expense would not be a body corporate expense therefore the 75% vote would not be enforceable here”.

Can anyone say if this is correct or a way around it?

Many thanks  

Regards