182. What is the mission of the Pope?The Pope, Bishop of Rome and the Successor of Saint Peter, is the perpetual, visible source and foundation of the unity of the Church. He is the vicar of Christ, the head of the College of bishops and pastor of the universal Church over which he has by divine institution full, supreme, immediate, and universal power.
Further reading: CCC 880-882, 936-937183. What is the competence of the college of bishops?
The college of bishops in union with the Pope, and never without him, also exercises supreme and full authority over the Church.
Further reading: CCC 883-885
184. How do the bishops carry out their mission of teaching?
Since they are authentic witnesses of the apostolic faith and are invested with the authority of Christ, the bishops in union with the Pope have the duty of proclaiming the Gospel faithfully and authoritatively to all. By means of a supernatural sense of faith, the people of God unfailingly adhere to the faith under the guidance of the living Magisterium of the Church.
Further reading: CCC
888-890, 939