The Catechism in Questions & Answers

664. What is necessary in order to be confirmed?

The first prerequisite for being confirmed is to have received the sacraments of Holy Baptism with water and Holy Sealing. Other prerequisites include regular attendance of the divine services and confirmation instruction. Confirmands are to know the main principles of the New Apostolic faith and the Articles of Faith, and be prepared to lead their lives in accordance with the gospel.