http://sedevacantist.com/newmass/qtvjmcn.htmAPPENDIX 5
A SOLEMN DECREE OF THE EcuмENICAL COUNCIL OF FLORENCE
A decree of the Council of Florence, promulgated by Pope Eugene IV, sets forth "the form of the words, which in the consecration of the body and blood of the Lord the holy Roman Church confirmed by the teaching and authority of the apostles had always been accustomed to use."
It is clear that neither pope nor council can ever substantially change the matter or form of any of the seven sacraments, since these were established by Christ Himself. But, even if it is granted that some minor (i.e., "accidental") change of words in the form could be made, in order lawfully to make such a change - a minor, non-substantial change - it would require a solemn papal pronouncement or a solemn decree of an ecuмenical council; that is to say, something of equal or greater authority than the aforementioned decree of the Council of Florence.
Needless to say, no such weighty authority has canonized the change in the form incorporated in the new vernacular "Canons." Nor can any legitimate authorization ever be forthcoming, for these changes are substantial and not merely "accidental." They are mutilations.
The aforementioned decree of the Council of Florence (1438-1445) follows:
"But since in the above written decree of the Armenians the form of the words, which in the consecration of the body and blood of the Lord the holy Roman Church confirmed by the teaching and authority of the Apostles had always been accustomed to use, was not set forth, we have thought that it ought to be inserted here. In the consecration of the body the Church uses this form of words: 'For this is My body; in the consecration of the blood it uses the following form of words: 'For this is the chalice of My blood, of the new and eternal testament, the mystery of faith, which shall be shed for you and for many unto the remission of sins.'"