Do I know the canon off hand? No, but from people who used to attend SSPX chapels who were married at a SSPX chapel, all they needed to do is get their marriage regularized with the diocese. I know the SSPX sacraments of marriage and confession are in a grey area because they do not have permisson from the local ordinary to use the facilities, but at the same time, they are validly ordained priests.
When the local ordinary is engaging in perverted sex acts with other men and covering up for his priests who rape children, do you not think that jurisdiction is supplied?
See the post above from GBCDOJ, which tells the entire story. Mike F's subsequent post will clarify the details.
In fact, their marriages were VALIDATED, not just 'regularized.'
SSPX has NO FACULTIES, thus, their Sacraments (except the Eucharist) are INVALID.