Canon 707

1. The preparation of the Eucharistic bread, the prayers performed by the priests before the Divine Liturgy, the observance

of the Eucharistic fast, liturgical vestments, the time and place

of the celebration and other like matters must be precisely established by the norms of each Church sui iuris. 2. For a just

cause and having removed any astonishment on the part of the

Christian faithful, it is permissible to use the liturgical vestments and bread of another Church sui iuris.