20 U.S.C. § 1087mm — Special rules for student aid index

For the purpose of this chapter, the term "student aid index" means, with respect to a student, an index that reflects an evaluation of a student's approximate financial resources to contribute toward the student's postsecondary education for the academic year, as determined in accordance with this part. The Secretary shall consider an applicant to automatically have a student aid index equal to zero if the applicant is eligible for the total maximum Federal Pell Grant under section 1070a(b)(1)(A) of this title, except that, if the applicant has a calculated student aid index of less than zero the Secretary shall consider the negative number as the student aid index for the applicant. Notwithstanding subsection (b), for an applicant (or, as applicable, an applicant and spouse, or an applicant's parents) who is not required to file a Federal tax return for the second preceding tax year, the Secretary shall for the purposes of this subchapter consider the student aid index as equal to − $1,500 for the applicant.