My girlfriend & I are both Latin Rite Catholics - I have grown up attending the Novus Ordo, and she has grown up in a schismatic community (SSPV) that does not recognize the authority of the current pope, or any since Pius XII (at the very least, they are quite vague on the topic). We’re currently considering marriage, but are are delaying engagement until we can see eye to eye with regard to the authority of the Pope.
It was suggested to us that we investigate switching rites to the Maronite or Byzantine Rite - My question regards the implications of both of us joining an Eastern Rite Church (in communion with the Holy See, not an Eastern Orthodox Church). Would she first have to regularize with the diocese in order to switch rites, even if she does not accept the authority of the pope or of our local ordinary as legitimate? Would we have to officially switch rites in order to marry in an Eastern Rite Church?