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That is a contractual clause not delegation of authority. You agree with something in exchange for something.
Authority comes from author. You cannot delegate your own author-ity, it's only yours. What you can delegate, indeed, is to act in your behalf, but that is power of attorney.
Whoever have any authority over you, it means slavery. They OWN you.
I think I'm using a different definition of authority, but I do 100% agree with your stance. I'm not going to quibble over semantics and the definition of words, just know that we are under complete agreement of the broader issue.
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