16. To whom is given the task of authentically interpreting the deposit of faith?

The task of giving an authentic interpretation of the deposit of faith has been entrusted to the living teaching office of the Church alone, that is, to the successor of Peter, the Bishop of Rome, and to the bishops in communion with him. To this Magisterium, which in the service of the Word of God enjoys the certain charism of truth, belongs also the task of defining dogmas which are formulations of the truths contained in divine Revelation. This authority of the Magisterium also extends to those truths necessarily connected with Revelation.

Further reading: CCC 85-90, 100


17. What is the relationship between Scripture, Tradition and the Magisterium?

Scripture, Tradition, and the Magisterium are so closely united with each other that one of them cannot stand without the others. Working together, each in its own way, under the action of the one Holy Spirit, they all contribute effectively to the salvation of souls.

Further reading: CCC 95