; (B) for a period not to exceed 3 months, due to unusual circumstances that disrupt the borrower’s ability to make timely payments on the loan; or (C) renewable at 12-month intervals for a period not to exceed 3 years, due to documented extreme economic hardship on the part of a borrower. (b) Annual repayment amount The annual repayment amount under this part for a taxable year for a borrower with 1 or more loans made under this part in repayment status shall be equal to the lesser of— (1) the income-based repayment obligation for such borrower for such year, as calculated under section 499E(a)(1)