May I ask you, specifically you, to explain Apostolic Authority for me ... was such authority passed to any who were made bishops and ministers in groups of believers built from receiving the message of Salvation in Christ?
As far as I can tell, Apostolic Authority is simply what it implies: the authority of an Apostle. Since there are no more Apostles, there can be no more Apostolic Authority.
However, Scripture plainly confers certain authorities and responsibilities on elders, deacons, and believers in general. Some of which are identical to those given to the Apostles. For example, the Great Commission was given to the Apostles by Jesus. I do not believe Jesus commissioned everyone on that day. Yet the responsibility to spread the Gospel to all men was given generally to believers in other parts of Scripture. Hence, the equivalent responsibility of the Great Commission rests with all believers even though Jesus commanded it of His apostles only.