SECTION 1. The last paragraph of section forty-nine of Republic Act Numbered Two hundred ninety-six, entitled "The Judiciary Act of nineteen hundred and forty-eight", is amended to read as follows:
"The Sixteenth Judicial District, of the Province of Davao, the City of Davao, the Provinces of Cotabato and Occidental Misamis, the Provinces of Zamboanga del Norte, Zamboanga del Sur, Zamboanga City, Basilan City, and the Province of Sulu."