The Military Intelligence Directorate is the authority delivering permits to enter the restricted zone running along the Israeli border in South Lebanon. The area is under control of the Hezbollah, at war against Israel. While it is possible to go to visit the numerous sites in this zone, it requires a clearance from the Military Intelligence, whose office is in Saida. The process is reasonably straightforward but, like any administrative obligation, is time consuming. Be carefull to have all the necessary documents if you don't want to have to go back to Beirut empty handed then coming again the next day. A compulsory obligation to fulfill if one wants to step in South Lebanon's war fields.