CHAPTER II : THE RESERVATION AND VENERATION OF THE BLESSED EUCHARIST
Can. 934 §1 The blessed Eucharist:
1° must be reserved in the cathedral church or its equivalent, in every parish church, and in the church or oratory attached to the house of a religious institute or society of apostolic life
2° may be reserved in a Bishop’s chapel and, by permission of the local Ordinary, in other churches, oratories and chapels.
§2 In sacred places where the blessed Eucharist is reserved there must always be someone who is responsible for it, and as far as possible a priest is to celebrate Mass there at least twice a month.
Can. 935 It is not lawful for anyone to keep the blessed Eucharist in personal custody or to carry it around, unless there is an urgent pastoral need and the prescriptions of the diocesan Bishop are observed.
Can. 936 In a house of a religious institute or other house of piety, the blessed Eucharist is to be reserved only in the church or principal oratory attached to the house. For a just reason, however, the Ordinary can permit it to be reserved also in another oratory of the same house.
Can. 937 Unless there is a grave reason to the contrary, a church in which the blessed Eucharist is reserved is to be open to the faithful for at least some hours every day, so that they can pray before the blessed Sacrament.
Can. 938 §1 The blessed Eucharist is to be reserved habitually in only one tabernacle of a church or oratory.
§2 The tabernacle in which the blessed Eucharist is reserved should be sited in a distinguished place in the church or oratory, a place which is conspicuous, suitably adorned and conducive to prayer.
§3 The tabernacle in which the blessed Eucharist is habitually reserved is to be immovable, made of solid and non-transparent material, and so locked as to give the greatest security against any danger of profanation.
§4 For a grave reason, especially at night, it is permitted to reserve the blessed Eucharist in some other safer place, provided it is fitting.
§5 The person in charge of a church or oratory is to see to it that the key of the tabernacle in which the blessed Eucharist is reserved, is in maximum safe keeping.