An Illinois appellate court recently ruled that a condominium unit owner's listing of her unit for short-term rentals with Airbnb constituted a "business," that violated the provision of her condominium declaration, which prohibited the use of units for business. Among other factors, the Court considered a scheme of City of Chicago regulations recently imposed on short-term residential rental intermediaries and advertising platforms, including rental registration with the City; financial reporting requirements, and imposing taxes on units for short-term transient occupancy. Condominium unit owners may be legally prohibited by a provision in the condo declaration from renting their units through Airbnb's platform. Is this an unfair restriction? Does it unreasonably restrict a condo unit owner's use and ownership rights?