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SpirituTou already caught this, but: women *cannot* be ordained. I.e. it's not just "disallowed"--it's impossible, and even if a bishop [or even the Pope] TRIED, with all the words and gestures and chrism in the world, and if the woman went on to try to "concelebrate" with the Pope [and even if the Pope smilingly permitted it], it wouldn't "take"; the woman would still be a non-priest, playing make-believe.

Here are the "money quotes" from Ordinatio Sacerdotalis; the last paragraph uses language specifically tailored to the invocation of papal infallibility:

Although the teaching that priestly ordination is to be reserved to men alone has been preserved by the constant and universal Tradition of the Church and firmly taught by the Magisterium in its more recent documents, at the present time in some places it is nonetheless considered still open to debate, or the Church's judgment that women are not to be admitted to ordination is considered to have a merely disciplinary force [note: this means "merely policy, which can be changed, as opposed to Church DOGMA, which cannot be changed]

Wherefore, in order that all doubt may be removed regarding a matter of great importance, a matter which pertains to the Church's divine constitution itself, in virtue of my ministry of confirming the brethren (cf. Lk 22:32) I declare that the Church has no authority whatsoever to confer priestly ordination on women and that this judgment is to be definitively held by all the Church's faithful.