I'm looking at OCC Bulletin 2000-20 and it says:
"Institutions should adopt and adhere to explicit standards that control the use of extensions, deferrals, renewals and rewrites of closed-end loans. The standards should exhibit the following:
-The borrower should show a renewed willingness and ability to repay the loan.
-The standards should limit the number and frequency of extensions, deferrals, renewals, and rewrites.
-additional advances to finance unpaid interest and fees should be prohibited.
Just working here until I get my letter from Hogwarts.