Neither Pope St. Pius X or Pope Pius XII changed the rules to allow heretics (non-Catholics) to be elected pope.
Bellator Dei,
So if they didn't change the rules, what did they change? What was the purpose of their docuмents? Of course, those officials who, (BEFORE V2 mind you), study such things would totally disagree with you.
Secondly, if Pius X and XII did change such rules (and they did, this is historical fact), are you willing to label them heretics?
Further, as you like to quote from V1 and since V1 declares that the pope enjoys supreme jurisdiction, how can you say that they have not the power to change such things? Are you denying that Pius X and XII were true popes?