Borrower Security Agreement between ADAC Laboratories and ABN AMRO Bank, N.V. regarding the extension of credit facilities dated September, 1999. 13 pages.
While it's not required, having a lawyer look over the agreement can be a good idea, as they can help ensure everything is above board and in your best interest.
Yes, there are local and state laws that regulate how these agreements are drawn up and enforced, so it's local law that provides some protection for both parties.
Yes, if your financial situation changes, it's worth speaking to your lender. They might be open to renegotiating the terms to help you out.