The part that caught my attention is:
-Que la “Fraternidad Sacerdotal San Pío X” no cuenta al presente con una “posición canónica” en la Iglesia y que por ello no ha de ponerse en su misma situación a quienes en la diócesis de Zárate-Campana se acogen conforme a las normas del derecho a la forma extraordinaria del rito romano, de la carta de S.S. Benedicto XVI dada motu proprio“Sumorum Pontificuм”.
It seems to be saying that since the SSPX has no canonical status, they do not have the right to the "EF" according to the norms of SP.
Well, in some sense, that is what the docuмent says: that, since the SSPX currently does not have a "canonical position" in the Church, it cannot place itself in the same situation (or at the same level, to say so) of the diocesan priests, who do conform to the norms established under the EF.