|Code of Canon Law|
IntraText - Text
THE RITES AND CEREMONIES OF THE EUCHARISTIC CELEBRATION
Can. 924 §1. The most holy eucharistic sacrifice must be offered with bread and with wine in which a little water must be mixed.
§2. The bread must be only wheat and recently made so that there is no danger of spoiling.
§3. The wine must be natural from the fruit of the vine and not spoiled.
Can. 925 Holy communion is to be given under the form of bread alone, or under both species according to the norm of the liturgical laws, or even under the form of wine alone in a case of necessity.
Can. 926 According to the ancient tradition of the Latin Church, the priest is to use unleavened bread in the eucharistic celebration whenever he offers it.
Can. 927 It is absolutely forbidden, even in extreme urgent necessity, to consecrate one matter without the other or even both outside the eucharistic celebration.
Can. 928 The eucharistic celebration is to be carried out in the Latin language or in another language provided that the liturgical texts have been legitimately approved.
Can. 929 In celebrating and administering the Eucharist, priests and deacons are to wear the sacred vestments prescribed by the rubrics.
Can. 930 §1. If an infirm or elderly priest is unable to stand, he can celebrate the eucharistic sacrifice while seated, but not before the people except with the permission of the local ordinary; the liturgical laws are to be observed.
§2. A blind or otherwise infirm priest licitly celebrates the eucharistic sacrifice by using any approved text of the Mass with the assistance, if needed, of another priest, deacon, or even a properly instructed lay person.