I’ve never seen a definitive listing, but off the top of my head a Special Resolution is needed for Motions involving the amendment, repeal, or creation (of new) By-Laws, for any change, addition, or alteration to the Common Property by the Owners Corporation (O/C) or by an Owner, for providing a discount on or not charging interest for levy contributions (e.g. for early and late payment respectively), for any “dealing” involving any part of the Common Property (e.g. a sale, or the granting of an easement/right-of-way), or granting to or removing an exclusive use privilege from an Owner (only with that Owner’s prior written consent in the latter case).
A Unanimous Resolution is required for Motions involving the distribution of surplus funds of the O/C to Owners, the winding-up of the Strata Scheme, and for not having building insurance cover and/or a sinking fund in two (2) Lot Schemes only.
Unless I’ve missing anything (in which case someone will jump in), all Motions involving other matters require a decision by simply majority (51%), and in the case where a “poll vote” is requested that majority is determined by the lot units of entitlement of those voting in favour expressed as a percentage of all those who vote (incl. by proxy).