The defunct Trans-Arabian oil Pipeline (Tapline) crosses through the southern half of the zone. Israel had permitted the pipeline's operation through the Golan Heights to continue after the territory came under Israeli occupation as a result of the Six-Day War in 1967, with repairs being facilitated by UNTSO observers. However, the section of the line beyond Jordan had ceased operation in 1976 due to transit fees disputes between Saudi Arabia and Lebanon and Syria, the emergence of oil supertankers, and pipeline breakdowns.