; or (ii) is unable to engage in any substantial gainful activity by reason of any medically determinable physical or mental impairment that can be expected to result in death, has lasted for a continuous period of not less than 60 months, or can be expected to last for a continuous period of not less than 60 months. (B) Disability determinations Subsection (a)(2) shall apply to a disability determination under this paragraph in the same manner as such subsection applies to a determination under subsection (a)(1). (C) Safeguards The safeguards to prevent fraud and abuse developed under subsection (a)(1) shall apply under this paragraph. (D) Reinstatement of loans The Secretary may promulgate regulations to reinstate the obligation of, and resume collection on, loans discharged under this paragraph in cases in which the Secretary determines that the reinstatement and resumption is necessary and appropriate based upon the regulations developed under subsection (a)(1). . C 4051. Purpose; authorization of appropriations Section 441 of the Higher Education Act of 1965 ( 20 U.S.C. 1087–51 ) is amended— (1) in subsection (b), by striking part, such sums as may be necessary for fiscal year 2009 and each of the five succeeding fiscal years. and inserting part— (1) $1,500,000,000 for fiscal year 2019; (2) $1,750,000,000 for fiscal year 2020; (3) $2,000,000,000 for fiscal year 2021; (4) $2,250,000,000 for fiscal year 2022; and (5) $2,500,000,000 for fiscal year 2023 and each succeeding fiscal year. ; (2) in subsection (c)— (A) in paragraph (3), by striking and ; (B) in paragraph (4)(C), by striking the period at the end and inserting ; and ; and (C) by adding at the end the following: (5) work-based learning designed to give students experience in any activity described in paragraph (1), (2), (3), or (4), whether or not credit is awarded.