[biblewonk]

"If anyone says that the received and approved rites of the Catholic Church, accustomed to be used in the administration of the Sacraments, may be despised or omitted by the ministers without sin and at their pleasure, or may be changed by any pastor (a term that includes the Supreme Pastor, the Pope] of the churches to other new ones, let him be anathema."

Now how could this be? This seems to say that no one can ever change a thing about the Sacraments.

[sinkspur]

Now how could this be? This seems to say that no one can ever change a thing about the Sacraments.

It's not. No Pope can bind another Pope in the area of liturgical practice, no matter how much a previous Pope says or thinks he can.

[gbcdoj]

Now how could this be? This seems to say that no one can ever change a thing about the Sacraments.

That's not what it means. It is just talking about "every pastor": that any priest whatsoever can just invent new rites. Otherwise the Council would contradict itself:

CANON XIII.-If any one saith, that the received and approved rites of the Catholic Church, wont to be used in the solemn administration of the sacraments, may be contemned, or without sin be omitted at pleasure by the ministers, or be changed, by every pastor of the churches, into other new ones; let him be anathema. (Council of Trent, Decree "On the Sacraments in General")

It furthermore declares, that this power has ever been in the Church, that, in the dispensation of the sacraments, their substance being untouched, it may ordain,--or change, what things soever it may judge most expedient, for the profit of those who receive, or for the veneration of the said sacraments, according to the difference of circumstances, times, and places. (Council of Trent, Sess. XXI, Ch. II)