Which of the following can a broker NOT do without proper authorization?

A broker working within a community association has specific responsibilities and limitations regarding their authority. Selling property in a community they manage typically requires proper authorization from the property owner or the association governing documents. This is crucial because the broker is acting on behalf of the community association, and any transactions involving ownership interests should be approved by the appropriate parties to prevent conflicts of interest and to ensure compliance with legal and ethical standards.

In contrast, advertising for clients, hiring additional agents, and conducting open houses typically fall within the broker’s standard operational activities and do not intrinsically require direct authorization from property owners or governing bodies unless specified by unique community rules or regulations. Therefore, selling property is a transaction that necessitates explicit permission and oversight, making it the correct answer to the question of what a broker cannot do without proper authorization.