188.8.131.52 Reservation and Custody of the Most Holy Eucharist
1. The norms of canons 934-944 and the liturgical books are to be most carefully observed by all regarding the reservation and custody of the Most Holy Eucharist so that any danger of corruption, disrespect or profanation is avoided.
2. The permission of the diocesan bishop is required to keep the Eucharist on one's person or carry it on a journey, apart from what is needed to bring it to the sick.  If consecrated hosts remain, they are to be promptly returned to the tabernacle.
3. The Most Holy Eucharist must be securely reserved in those places identified by law, and is to be reserved in no other place without the permission of the ordinary.  Requests to reserve the Most Holy Eucharist elsewhere may be directed to the chancellor.
4. Consecrated hosts are to be transported only in pyxes, and the pastor is to see that a record is kept to whom a pyx is given, the name of the sick person and the dates on which the pyx is given and returned. 
5. The Precious Blood may only be reserved for giving Communion to someone who is sick. In that case, it is kept in a properly covered vessel and is placed in the tabernacle after communion. If some remains after the Communion of the sick person, it should be consumed by the minister, who should also see to it that the vessel is properly purified. (See the Particular Norms for the Celebration and Distribution of Holy Communion Under Both Kinds, available at the diocesan website, n. 61, regarding reservation of the Precious Blood. )
 See under "Reverence for the Eucharistic Species" in Guidelines for Ministers of Communion to the Sick (January 2003), available at the diocesan website. Also see c. 935.
 c. 934 §1, 1-2º.
 "Reverence for the Eucharistic Species."
 And see Norms for the Distribution and Reception of Holy Communion Under Both Kinds in the Diocese of the United States, n. 54.)