In my home state, an LLC isn't even required to have an operating agreement. If the LLC decides to have one, it will address anything and everything the members want it to address.
The question back to the bank that is requesting it is: What, exactly, is it that you are looking for? On the lending side there should be clear answers like "borrowing authority" and the "authority to pledge collateral." On the deposit side there should still be an answer, but you're going to need to figure out what it is.
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In this world you must be oh so smart or oh so pleasant. Well, for years I was smart. I recommend pleasant.