The Last Gospel is said at the Tridentine Mass that I attend. There are no "bidding prayers", the old Roman calendar is followed and I've never seen nor do I desire to see an " altar girl." I am not aware if anyone receives the Blessed Sacrament in the hand (although I doubt it). I permit no distractions during those few minutes when the Lord is sacramentally present within me.
There are rules in SSPX that were not there before Vatican II. For example, the priest who is pastor at St Michael's (SSPX church) in the Los Angeles will not give communion to those he does not know unless they meet with him before Mass. (That was never a requirement of the Tridentine Mass).
Further, I did query EWTN about the status of SSPX, because of family members attending.
Basically, communion is valid in this church (SSPX) and confessions (if in danger of death) are valid. I don't know what sacraments are not valid.
I think the biggest SNAFU with Canon law is that the bishops that are in control are ex-communicated and were not approved to be ordained by Pope John Paul II, and the late Archbishop is dead.