Ordinatio Sacerdotalis is NOT an infallible definition of a revealed truth.  It is an "apostolic letter" addressed to the bishops, not to the entire Church.  It is entirely written in past and present tense, and says NOTHING about what the Church can or cannot do in the future;  so it is "definitive" with respect to the past and the present, but cannot possibly be definitive about the future, since it says NOTHING about the future.  My conjecture is that it was an exercise in double talk, to buy time given that the old doctrine about only male flesh being "proper matter" no longer makes sense in light of the TOB, but they had nothing better than the *new* (since 1976) doctrine about the 12 male apostles for CCC 1577.  But there is a difference between the patriarchal priesthood of the Old Law and the sacramental priesthood of the New Law..  The 12 male apostles were chosen while Jesus was still working under the Old Law.  After the resurrection, the New Law starts.  Study the TOB!