The article, however, also states:
In a previous letter to the same correspondent we had already indicated the canonical status of the Society of St. Pius X which we will summarize briefly here.
1.) The priests of the Society of St. Pius X are validly ordained, but they are suspended from exercising their priestly functions. To the extent that they adhere to the schism of the late Archbishop Lefebvre, they are also excommunicated.
2.) Concretely this means that the Masses offered by these priests are valid, but illicit i.e., contrary to the law of the Church.
No matter how you look at it, those who attend Mass at an SSPX Chapel do so for the Tridentine Mass, albeit illicit. And sitetest has picked up on the tone of this article which is to draw attention to the confusion that results from seeing the word 'catholic' next to a church's name. Clearly, no Roman (or Eastern) Catholic should be attending Mass at a Polish National Church or one affiliated with the Old Catholic Church.
As are countless NO masses offered in every diocese in the world due to the blatant disregard for the rubrics by not only priests but bishops as well.