1. North Central States: Kogi, Niger, Benue, Kwara, Plateau, Nassarawa and the Federal Capital Territory.
2. North-Eastern States: Taraba, Borno, Bauchi, Adamawa, Gombe and Yobe State.
3. North-Western States: Kaduna, Kebbi, Zamfara, Sokoto, Kano, Jigawa and Katsina State.
4. South-Eastern States: Ebonyi, Enugu, Imo, Abia and Anambra State.
5. South-Southern States: Akwa-Ibom, Bayelsa, Edo, Cross River, Rivers and Delta State.
6. South-Western States: Oyo, Ogun, Lagos, Ondo and Osun State.