The resolution, adopted on Friday with 14 votes in favor and one abstention by the United States, replaces the African Union Transition Mission in Somalia (ATMIS).
The move supports Somalia's ongoing efforts to transition national security responsibilities to its own forces.
Under the mandate, African Union member states are authorized to deploy up to 12,626 personnel, including 1,040 police officers, until June 30, 2025.
By that date, the realignment of all AU troops from ATMIS to AUSSOM must be completed.
The mission will provide support to the Somali government in combating Al-Shabaab and other groups affiliated with the Islamic State.
The authorization will last for 12 months, marking a critical phase in Somalia's path toward enhanced security and stability.
IGIHE
