; and (2) the individuals each agree to the requirements of service in substance use disorder treatment employment, as described in subsection (d). (b) Payments For each year of obligated service by an individual pursuant to an agreement under subsection (a), the Secretary shall make a payment to such individual as follows: (1) Service in a shortage area The Secretary shall pay— (A) for each year of obligated service by an individual pursuant to an agreement under subsection (a), 1/6 of the principal of and interest on each eligible loan of the individual which is outstanding on the date the individual began service pursuant to the agreement; and (B) for completion of the sixth and final year of such service, the remainder of such principal and interest. (2) Maximum amount The total amount of payments under this section to any individual shall not exceed $250,000. (c) Eligible loans The loans eligible for repayment under this section are each of the following: (1) Any loan for education or training for a substance use disorder treatment employment. (2) Any loan under part E of title VIII (relating to nursing student loans). (3) Any Federal Direct Stafford Loan, Federal Direct PLUS Loan, Federal Direct Unsubsidized Stafford Loan, or Federal Direct Consolidation Loan (as such terms are used in section 455 of the Higher Education Act of 1965). (4) Any Federal Perkins Loan under part E of title I of the Higher Education Act of 1965. (5) Any other Federal loan as determined appropriate by the Secretary. (d) Requirements of service Any individual receiving payments under this program as required by an agreement under subsection (a) shall agree to an annual commitment to full-time employment, with no more than 1 year passing between any 2 years of covered employment, in substance use disorder treatment employment in the United States in— (1) a Mental Health Professional Shortage Area, as designated under section 332