Source: http://www.vatican.va/archive/ENG1104/__P2T.HTM
Timestamp: 2019-04-26 04:05:48+00:00

Document:
Can. 840 The sacraments of the New Testament were instituted by Christ the Lord and entrusted to the Church.
As actions of Christ and the Church, they are signs and means which express and strengthen the faith, render worship to God, and effect the sanctification of humanity and thus contribute in the greatest way to establish, strengthen, and manifest ecclesiastical communion. Accordingly, in the celebration of the sacraments the sacred ministers and the other members of the Christian faithful must use the greatest veneration and necessary diligence.
Can. 842 §1. A person who has not received baptism cannot be admitted validly to the other sacraments.
§2. The sacraments of baptism, confirmation, and the Most Holy Eucharist are interrelated in such a way that they are required for full Christian initiation.
§2. Pastors of souls and other members of the Christian faithful, according to their respective ecclesiastical function, have the duty to take care that those who seek the sacraments are prepared to receive them by proper evangelization and catechetical instruction, attentive to the norms issued by competent authority.
Can. 844 §1. Catholic ministers administer the sacraments licitly to Catholic members of the Christian faithful alone, who likewise receive them licitly from Catholic ministers alone, without prejudice to the prescripts of §§2, 3, and 4 of this canon, and ⇒ can. 861, §2.
Catholic ministers in whose Churches these sacraments are valid.
Can. 845 §1. Since the sacraments of baptism, confirmation, and orders imprint a character, they cannot be repeated.
were actually or validly conferred, they are to be conferred conditionally.
Can. 847 §1. In administering the sacraments in which holy oils must be used, the minister must use oils pressed from olives or other plants and, without prejudice to the prescript of ⇒ can. 999, n. 2, consecrated or blessed recently by a bishop; he is not to use old oils unless it is necessary.
§2. The pastor is to obtain the holy oils from his own bishop and is to preserve them diligently with proper care.
Can. 848 The minister is to seek nothing for the administration of the sacraments beyond the offerings defined by competent authority, always taking care that the needy are not deprived of the assistance of the sacraments because of poverty.

References: §1

§2

§2
 §1
 §2
 §1
 §1

§2