The three types of area jurisdiction in Judea and Samaria (the West Bank) – A, B and C – were meant as a short-term fix until a real Israeli-Palestinian peace accord could be crafted. More than 20 years later, both sides have broadly infringed on these parameters. Israel regularly penetrates Area A for security reasons, while the PA (with EU support) is building illegally and dangerously in key parts of Area C that are critical to Israel. Israel should halt this encroachment with determination.