Council of Trent: Session XXV, Reformation, Chapter XXI

CHAPTER XXI. In all things the authority of the Aposto1ic See shall remain untouched.

Lastly, the holy Synod declares, that all and singular the things which, under whatsoever clauses and words, have been ordained in this sacred Council, in the matter of reformation of morals, and ecclesiastical discipline, as well under the Sovereign Pontiffs, Paul III., and Julius III., of happy memory, as under the most blessed Pius IV., have been so decreed, as that the authority of the Apostolic See both is, and is understood to be, untouched thereby

Translation: J. Waterworth, The Canons and Decrees of the Council of Trent (1848), Hanover Historical Texts Project transcription (1995).