SpaSpray – frankly, I’d be more concerned about the fact that an average spa weighs around 2 tonnes (when full of water and people), so you additionally need to consider:
1. If the balcony can safely handle the concentrated weight of the spa at its installed position? Your Body Corporate should consult a structural engineer about that.
2. Is the balcony surface waterproof? Only a fully waterproof, sealed, concrete or ceramic floor floor is suitable
3. Is there adequate drainage? This must be sufficient to contain a sudden escape of water and the requisite partial emptying of it (onto the balcony?).
4. Is there adequate ventilation on all sides? Heaters produce condensation.
5. Is the electrical supply safe for outdoor use?
Perhaps not guidance, but certainly something that your Body Corporate must consider as part of the upcoming discussions and any Consent that it may or may not grant.