The problem with the WTS/Jehovahs Witnesses is that they MUST lie to assert an authority that they do not possess, The reason that their teachings change so often is because when new people get control of the governing body, they interpret scriptures with their own personal views and promote those flawed views in AWAKE and THE WATCHTOWER. That is why they follow a rigorous regiment of revisionist history not only of the scriptures, but also of their own short and complicated history.
How do we know this? Because Jesus inspected all the churches in 1914 and found..blah, blah, blah.
Really? Says who? An organization that was founded in America some 150 years ago? From a snake oil salesman who didn't like the idea of hell. Guess what, not one likes the idea of hell. Doesn't mean that it doesn;t exist.
A better question as to who has the authority to interpret the bible has everything to do with simple, common sense.
Who gave the world the bible and promoted it as the word of God? A_The Catholic Church
Why did they compile the bible? A_To use in their liturgical practices
Why would you listen to someone elses' interpretation? A_ Because you've been duped
What about the Great Apostasy? A_Never happened, just another JW lie
The bible states unequivocally that Jesus commissioned the apostles to build HIS Church. A Church to Jesus, hence the term "Christianity" and not "Jehovahanity"