First Legislative District:
- Polomolok
- Tampakan
- Tupi
- Koronadal City
- Banga
- Lake Sebu
- Norala
- Sto. Niño
- Surallah
- Tantangan
- Tboli
- General Santos City
The signed law also states that " The incumbent representatives of the present First and Second Legislative District of South Cotabato shall continue to represent the districts until the new representatives have been duly elected and qualified".
The Commission on Elections is also mandated by the law to “issue the necessary rules and regulations to implement this Act within thirty (30) days after its effectivity", Section 3 of Republic Act 11243 stated.