; (IX) forbearance under section 428(c)(3)(A)(i)(IV), for service for which the borrower would qualify for a partial repayment of his or her loan under the Student Loan Repayment Programs administered by the Department of Defense; or (X) administrative forbearance under paragraph (8) or (9) of section 685.205(b) of title 34, Code of Federal Regulations. (iv) A borrower shall be automatically enrolled in a Revised Pay As You Earn Repayment plan for a loan at 75 days delinquent on such loan. (v) A borrower who missed qualifying payments during a forbearance or deferment period not listed in clause (iii), shall have the opportunity to provide a back payment for the missed payments in order have those payments counted toward the 20-year or 25-year forgiveness period, except there shall be no opportunity to provide a back payment for periods of in-school deferment. (vi) For a borrower who is solely an undergraduate borrower— (I) who has borrowed $10,000 or less in total in loans under this part, not including loan fees, the Secretary may determine that the borrower has met the loan forgiveness requirements after 120 payments under the Revised Pay As You Earn Repayment plan; (II) who has borrowed more than $10,000 but $11,000 or less in total in loans under this part, not including loan fees, the Secretary may determine that the borrower has met the loan forgiveness requirements after 132 payments under the Revised Pay As You Earn Repayment plan; (III) who has borrowed more than $11,000 but $12,000 or less in total in loans under this part, not including loan fees, the Secretary may determine that the borrower has met the loan forgiveness requirements after 144 payments under the Revised Pay As You Earn Repayment plan; (IV) who has borrowed more than $12,000 but $13,000 or less in total in loans under this part, not including loan fees, the Secretary may determine that the borrower has met the loan forgiveness requirements after 156 payments under the Revised Pay As You Earn Repayment plan