Tabernacle
Holy Sacrifice of the Mass
Holy Communion
The Catechism states:
1183 The tabernacle is to be situated "in churches in a most worthy place with the greatest honor."61 The dignity, placing, and security of the Eucharistic tabernacle should foster adoration before the Lord really present in the Blessed Sacrament of the altar.62
1379 The tabernacle was first intended for the reservation of the Eucharist in a worthy place so that it could be brought to the sick and those absent outside of Mass. As faith in the real presence of Christ in his Eucharist deepened, the Church became conscious of the meaning of silent adoration of the Lord present under the Eucharistic species. It is for this reason that the tabernacle should be located in an especially worthy place in the church and should be constructed in such a way that it emphasizes and manifests the truth of the real presence of Christ in the Blessed Sacrament.It looks obvious to me that "the most worthy place with the greatest honors" is to place the Tabernacle at the top, in the center of the main altar... some Catholic churches have the Tabernacle today in a side altar, or even in a room out of the main building of the church.
Canons 924-926 state:
Can. 924 §1 The most holy Sacrifice of the Eucharist must be celebrated in bread, and in wine to which a small quantity of water is to be added.
§2 The bread must be wheaten only, and recently made, so that there is no danger of corruption.
§3 The wine must be natural, made from grapes of the vine, and not corrupt.
Can. 925 Holy communion is to be given under the species of bread alone or, in accordance with the liturgical laws, under both species or, in case of necessity, even under the species of wine alone.
Can. 926 In the eucharistic celebration, in accordance with the ancient tradition of the latin Church, the priest is to use unleavened bread wherever he celebrates Mass.
An update is needed, on how to receive Holy Communion: Kneeling, standing, in the tongue, in the hand... what the Church recommends and allows...
The Catechism states:
1407 The Eucharist is the heart and the summit of the Church's life, for in it Christ associates his Church and all her members with his sacrifice of praise and thanksgiving offered once for all on the cross to his Father; by this sacrifice he pours out the graces of salvation on his Body which is the Church.
1415 Anyone who desires to receive Christ in Eucharistic communion must be in the state of grace. Anyone aware of having sinned mortally must not receive communion without having received absolution in the sacrament of penance.
It is obvious that an update is needed, on the way to receive Holy Communion: In the tongue, hand, kneeling, standing... what the Church allows and recommends!.