Papal bull*

Papal Bull: "Now, therefore, we declare, say, determine and pronounce that for every human creature it is necessary for salvation to be subject to the authority of the Roman pontiff." (Porro subesse Romano Pontifici omni humanae creaturae declaramus, dicimus, definimus, et pronuntiamus omnino esse de necessitate salutis). -- issued 18 November 1302, by Boniface Pope VIII

According the Catholic Encyclopedia at NewAdvent.org, "The Bull lays down dogmatic propositions on the unity of the Church, the necessity of belonging to it for eternal salvation, the position of the pope as supreme head of the Church, and the duty thence arising of submission to the pope in order to belong to the Church and thus to attain salvation." Also, "The Bull is universal in character."

Is this still the teaching of the Roman Catholic Church?

* a formal papal document, apparently so called because it has a bulla (seal) attached