UN Member States, Cities, United Nations entities, international and regional organizations, the private sector, foundations and NGOs are among entities invited to showcase their most innovative initiatives in promoting sustainable urbanization at the Urban Expo. The Expo will cover over 18,000m2 with complimentary 9m2 booths set aside for the Least Developed Countries (LDCs). These will be available on a first-come, first-served basis and countries wishing to book exhibition space are advised to make early bookings.