; and (4) has a record of employment with the Department that, in the judgment of the Secretary, demonstrates a high likelihood that the individual will be successful in completing such course of education or training and in gaining employment in a field related to such course of education or training. (c) Period of obligated service (1) Agreement (A) In general An agreement between the Secretary and a participant under the Program who seeks a scholarship under this section, in addition to the requirements set forth in section 7604 of this title, shall include the following: (i) The agreement of the Secretary to provide the participant with a scholarship under the Program for a specified number of school years, which may not exceed the credit equivalent of four full school years, during which the participant pursues a course of education or training described in subsection (b)(3) that meets the requirements set forth in section 7602(a) of this title. (ii) Subject to subparagraph (B), the agreement of the participant to serve as a full-time employee in the Department in a position described in subsection (b)(3)(A) for a period of time, not less than one year, that is equal to the period of the course of education or training for which a scholarship is provided under this section (in this section referred to as the period of obligated service of the participant). (B) Part-time students In the case of a participant who is a part-time student during a school year with respect to which a scholarship is provided to the participant under this section, the period of obligated service of the participant incurred during that school year shall be reduced in accordance with the proportion that the number of credit hours carried by the participant in that school year bears to the number of credit hours required to be carried by a full-time student in the course of education or training pursued by the participant during that school year, but in no event may the total period of obligated service of the participant be reduced to