Zamboanga Peninsula is an authoritative district in the Philippines, assigned as Region IX. The region consists of three provinces (Zamboanga del Norte, Zamboanga del Sur, and Zamboanga Sibugay) and two autonomous urban areas (Isabela City and Zamboanga City). The area was already known as Western Mindanao before the establishment of Executive Order No. 36 on September 19, 2001. The city of Pagadian is the territorial focus. Along the shores of the promontory are various coves and islands. The promontory is associated with whatever is left of Mindanao through an isthmus arranged between Panguil Bay and Pagadian Bay. Its region comprises of the three Zamboanga regions and the city of Zamboanga, and the limit between the promontory and territory is falsely set apart by the outskirt between the areas of Zamboanga del Sur and Lanao del Norte.