; or (II) accept a minimum service obligation of 2 years with an award amount equal to 50 percent of the amount that would otherwise be payable for full-time (as so defined) service. . (b) Indian Health Service loan repayment program Section 108(f)(1)(B) of the Indian Health Care Improvement Act ( 25 U.S.C. 1616a(f)(1)(B) ) is amended by striking clause (iii) and inserting the following: (iii) to serve for a period of time (referred to in this section as the period of obligated service ) equal to— (I) 2 years, or a longer period of time as the individual may agree to serve, in the full-time (as defined in section 331(j) of the Public Health Service Act ( 42 U.S.C. 254d(j) )) clinical practice of the profession of the individual in an Indian health program to which the individual may be assigned by the Secretary; or (II) (aa) 4 years, or a longer period of time as the individual may agree to serve, in the half-time (as defined in that section) clinical practice of the profession of the individual in an Indian health program to which the individual may be assigned by the Secretary; or (bb) not less than 2 years in the half-time (as so defined) clinical practice of the profession of the individual in an Indian health program to which the individual may be assigned by the Secretary with a loan payment amount equal to 50 percent of the amount that would otherwise be payable for full-time (as so defined) service; .