I was wondering about the sacraments administered by the SSPX priests. It appears that most people on this forum agree that most of the sacraments are valid but illicit, and that two are invalid. Let assume that a Catholic (not SSPX) understands that participating to a SSPX Mass is not forbidden under some conditions, and he also understands that the SSPX priest commits mortal sin by performing illicit sacramental functions.
Given these assumptions is the Catholic committing a sin by asking the SSPX priest to perform an illicit sacramental function? I think that I could answer to this question with either a YES or a NO and I would still able to somehow to justify my answer.
For example if the participation to the Mass is not forbidden then how can he commit a sin by receiving Communion? (NO)
Or a different case, where if he asks for a specific sacramental function that is only about him as an individual and would not be performed without him, then he commits a sin. (YES)