It is very clear that this anathema declares that it is a heresy to say that any pastor of the Catholic Church, whosoever has the power to revise the sacred liturgy, the traditional Rites, changing the customary Rites into new Rites.
Here is what Trent said:
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. (Session XXI, Decree on Communion Under Both Kinds, Chapter II)
Quite different from what Kramer claims is the Tridentine doctrine.
As a matter of fact, the official policy of the Second Vatican Council was quite clearly stated by Archbishop Pericle Felici, who at the time was the General Secretary ... Very clearly, very precisely, the policy position of the Second Vatican Council regarding itself was that those propositions and doctrines which are of a novel character are not being imposed, under any obligation, on the faithful.
Notificationes' Given by the Secretary General of the Council at the 123rd General Congregation, November 16, 1964...
Taking conciliar custom into consideration and also the pastoral purpose of the present Council, the sacred Council defines as binding on the Church only those things in matters of faith and morals which it shall openly declare to be binding. The rest of the things which the sacred Council sets forth, inasmuch as they are the teaching of the Church's supreme magisterium, ought [debent] to be accepted and embraced by each and every one of Christ's faithful according to the mind of the sacred Council.
...
+ PERICLE FELICI
Titular Archbishop of Samosata
Secretary General of the Second Vatican Ecumenical Council
According to Lewis & Short, debeo with the infinite, as is the construction here, means:
(b). With inf., to be bound, in duty bound to do something; I ought, must, should, etc., do it (in class. prose always in the sense of moral necessity; in the poets sometimes for necesse est):