Note the use of the word "apostolic"; meaning what was established by the original apostles (as described in scripture) not whatever church leaders of the future might initiate on their own whims or misreading of scripture. Paul wasn't offering a blank check.
My challenge to the anti-sola scriptura writers is to provide any scriptural support the notion of authoritative tradition as evolving. Of course, I realize that your self-reinforcing position doesn't recognize any burden to do so.
So the doctrine of the Holy Trinity is out, then? What about the hypostatic union?
Paul wasn't offering a blank check.
Paul doesn't have the power to offer a blank check. The only 'blank check' is the guidance of the Holy Spirit, explicitly promised by Christ and descended upon the Church on Pentecost Sunday.
My challenge to the anti-sola scriptura writers is to provide any scriptural support the notion of authoritative tradition as evolving.
Christ, Himself, is proof of that. The ultimate evolution of Tradition:
"Matthew 5:17 Do not think that I am come to destroy the law, or the prophets. I am not come to destroy, but to fulfill."
Christianity is the complete evolution of Judaic tradition. Jesus made clear that He Himself was the manifestation of this evolution.