Sensitive border are as such as Mt Kailash and eastern Tibet also require a military permit and a foreign-affairs permit. For Tholing and Tsaparang in western Tibet you will also need a permit from the local Cultural Antiquities Department. All these will be arranged by the tour agency if you book a tour. For remote places such as the Yarlung Tsangpo gorges or the Bonri Kora in eastern Tibet, or for any border area, you need the tour agency to get permits for you.