My reference was not to the QLD law but the NSW act:
65A Owners corporation may make or authorise changes to common property
(1) For the purpose of improving or enhancing the common property, an owners corporation or an owner of a lot may take any of the following action, but only if a special resolution has first been passed at a general meeting of the owners corporation that specifically authorises the taking of the particular action proposed:
(a) add to the common property,
(b) alter the common property,
(c) erect a new structure on the common property.
Fitting a tempering value would be considered an improvement requiring a SR.
I dare say a lot of strata would approve this via a Ordinary Resolution or even a vote at the EC and most people would go along with this but anyone in the know would realize this is not correct and leave the Strata liable (if anyone cared that much).
I’m not splitting hairs just stating the law in NSW and everything I said previously would apply to NSW.