That’s not entirely correct, and whilst I don’t want to indulge in pedantics about the status of a “substitute” E/C Member as determined by thesculpture‘s Owners Corporation and that of an “acting” E/C Member as permitted under the NSW Strata Schemes Management Act (Sch 3, Cl 3), there is a difference.
So KWP (post #2) and thesulpture’s E/C Treasurer are both correct, in that whilst “substitutes” certainly are not Members of the E/C (only the 3 elected are), any of them (or in fact any other Owner) could with the majority prior approval of E/C be nominated as an “acting” E/C Member by any elected Member who couldn’t attend a particular Meeting.
So whilst the terminology and the procedure taken by thesculpture‘s O/C was incorrect, what it’s effectively done is to provide the details of each E/C Members “acting” counterpart ahead of time, and so long as that’s approved by the other Members attending on the day, it’s compliant.
By the way, the “substitutes” can attend E/C Meetings as non-participating observers, just as any other Owner/s could at their discretion.