Catechism of the Catholic Church §1312 — excerpt
The original minister of Confirmation is the bishop. In the East, ordinarily the priest who baptizes also immediately confers Confirmation in one and the same celebration.
This translation is under copyright, so only the cited words are quoted here. Follow the link for the full text. Translation: English translation of the Catechism of the Catholic Church, 2nd ed. (Libreria Editrice Vaticana), as posted at vatican.va.
Also cites: LG 26 · CIC, Can. 883 # 2