In the event of default or to avoid imminent default, the Department of Veterans Affairs may at any time enter into an agreement with the borrower which will permit the latter temporarily to repay the obligation on a basis appropriate to the borrower's apparent current ability to pay or may enter into an appropriate recasting or extension agreement: Provided, That no such agreement shall extend the ultimate repayment of a loan beyond the expiration of 30 years and 32 days from the date of the loan. Provided further, That nothing in this section shall be deemed to limit the forbearance or indulgence which the Secretary may extend in an individual case pursuant to the provisions of 38 U.S.C. 3720(f).