SSPX is the “Society of St. Pius X,” that is, Pope Pius the 10th, who was Pope ... oh, early in the 20th Century. Nice fellow, the children’s biography of him is titled “The Farm Boy Who Became Pope,” because of his background in rural poverty.
The SSPX branched off from the “regular” Catholic Church in the 60s or 70s. You’re probably not interested in why, or where that puts them under Canon Law.
Actually, being involved with Linux, I do follow forking and re-integration of the kernel. So yes, I am interested. Thank you for the information. All of you.
I shall leave you to your caucus and bother you no more.
/johnny