I don't work in a bank so I don't know what the laws etc are, but I do know, that if you (or your "family" or "business") have enough money with a particular bank, the bank personnel (ie managers) will usually bend over backwards to make sure you are taken care of 100%. The office I work at has a very solid banking realtionship w/ a regional bank, and the office we deal with, man, we are treated like royalty when we are there (which is rare, because they usually come to us) matter of fact, later today, we are expecting one of the bank personnel to bring out new signature cards as we are changing some of the accounts co-signors.
I don't know what type of "modifying" you were alluding to in our orig post, but I do stand by the if you put/have enough money there, they usually bend over backwards for YOUR convenience theory as I have seen that for fact due to my boss's. we have even been w/ national banks & treated this way.