*LOL The man is certifiable
Answer: WRONG!!! Quo Primum is the Law that placed the Tridentine rite as the universal rite of the Latin Church, and Quo Primum was derogated by Missale Romanum of Paul VI. The Tridentine rite was not derogated but the LAW Quo Primum was. One Law of a legislator replaces the former Law of the former legislator.
* One doesn't know whether or not fellay is insane or ignorant; or both. Either way, the sspx is headed by the theological equivalent of Hank Kimball