I am trying to think of what may be in a tradesman’s quote that would need the protection of a confidentiality clause. Unless there is information in it that is proprietary to the tradesman, it is difficult to see what would make it so special. The strata committee doesn’t owe any duty to tradespeople under the Act – the members of the Committee must carry out their functions for the benefit of the owners corporation.
Certain things discussed at a Committee meeting, or considered by the Committee members may be confidential but they are limited. The best example is legal advice that in some circumstances may be privileged.
As Jimmy has pointed out, an owner has the right to attend Committee meetings. If a Committee is considering quotes at a meeting, it is arguable that those quotes should be included in the agenda for the meeting, and that would be available to all owners. The minutes of the meeting also have to be provided to all owners. As they say, sunlight is the best disinfectant.