ISC is calculated on the basis of eligible registrations of Indian students as of the conclusion of the third week of each academic term.

To calculate ISC for an academic term, begin by adding all credit hours of full-time Indian students and all credit hours of part-time Indian students, including full-time and part-time distance education Indian students, who are registered at the conclusion of the third week of the academic term.

Credit hours earned by Indian students who have not obtained a high school degree or its equivalent may be added if you have established criteria for the admission of such students on the basis of their ability to benefit from the education or training offered. You will be presumed to have established such criteria if your admission procedures include counseling or testing that measures students' aptitude to successfully complete the courses in which they enroll.

No credit hours earned by an Indian student attending high school and applied towards the student's high school degree or its equivalent may be counted toward computation of ISC; and no credit hours earned by an Indian student not making satisfactory progress toward a degree or certificate may count toward the ISC.

If ISC is being calculated for a fall term, add to the calculation in paragraph (b) of this section any credits earned in classes offered during the preceding summer term.

Add to the calculation in paragraph (b) of this section those credits being earned in an eligible continuing education program at the conclusion of the third week of the academic term. Determine the number of those credits as follows:

For institutions on a semester system: One credit for every 15 contact hours and

For institutions on a quarter system: One credit for every 10 contact hours of participation in an organized continuing education experience under responsible sponsorship, capable direction, and qualified instruction, as described in the criteria established by the International Association for Continuing Education and Training. Limit the number of calculated eligible continuing education credits to 10 percent of your ISC.

Divide by 12 the final calculation in paragraph (f) of this section. The formula for the full calculation is expressed mathematically as:

In the formula in paragraph (g) of this section, the abbreviations used have the following meanings:

FTCR = the number of credit hours carried by full-time Indian students (students carrying 12 or more credit hours at the end of the third week of each academic term); and

PTCR = the number of credit hours carried by part-time Indian students (students carrying fewer than 12 credit hours at the end of the third week of each academic term).

SCR = in a fall term, the number of credit hours earned during the preceding summer term.

CECR = the number of credit hours being earned in an eligible continuing education program at the conclusion of the third week of the academic term, in accordance with paragraph (f)(2) of this section.