The Canon Law aspect further comes into play when you look at who is the arbiter and judge of Canon Law. The chief judge for Canon Law is the one whom is has office of Kephas, the Pope. Regardless of our interpretation of a portion of Canon Law, when the Pope make a ruling on said portion of Canon Law, the Pope’s ruling overrules our own. In this case, Pope John Paul II made it very clear that the consecrations would not be authorized, and that they would be violating Canon Law.
Let us be clear on this; Bishop Lefebvre did not have the authority to circumvent Canon Law in this case. The Pope has the Keys, he is the one who decides such things. Otherwise any Bishop with their own motivations will unilaterally declare a crisis. I mean, if another Arius shows up, he could pull a Lefebvre and declare “crisis!”, and consecrate some Bishops unlawfully. To go against the lawful and valid authority of the office of Kephas, quite simply, is unacceptable.
Also of interest is the multiple efforts made by Bishop Lefebvre to essentially say he is loyal to the office of Kephas, but not loyal to the Pope himself. This is wildly dangerous, and certainly bordering outright sedevacantistism. It does reflect certain justification that SSPX supporters use which, among other things, diminish Papal authority and the validity of the 1983 Canon Law - which, again either borders on sedevacantistism or outright approaches it.
There’s irony in Bishop Lefebvre’s accusations towards Blessed Pope Paul VI (none of which have any citations, and some of which are second hand pieces of information), saying he is a “liberal”, when Bishop Lefebvre did what many would call a “liberal” action by going against Canon Law and Saint Pope John Paul II. His successors likewise engage in the liberal practice of administrating illicit and invalid Sacraments without batting an eye. Bishop Lefebvre saying “Pope Paul VI is a liberal and he does not believe in the fixity of dogmas”. If the Lawyer turned Prophet did not believe in the fixity of dogmas, you’d think he’d fold to the pressure of others and not write Humanae Vitae.
Circling back to disobedience. The namesake and patron of the SSPX is Saint Pope Pius X. Pius X was a full member of the Secular Franciscan Order, making him a full Franciscan just like the Friars and Poor Clares. Pius X would have advocated that any internal reforms be done in the same manner that St. Francis did. No actions that would cause the suspensions of clergy, no actions that would cause illicit and invalid Sacraments. And gaining the permission from local Bishops and working with them. Yes you can rock the boat, and you can say your piece. You can articulate your points and present your case. But for St. Francis, there would be no outright disobedience. In this sense, Bishop Lefebvre betrayed the founder of his Society, which we see the legacy of today with illicit Masses, invalid confirmations, invalid marriages, and for the longest while invalid confessions.