this subpart to a participating eligible institution shall be used to waive or significantly reduce tuition and fees for eligible students by an amount not to exceed the annual per-student rebate amount. Such funds under this subpart may only be used to waive or reduce tuition and fees for the first 60 credits for which an eligible student is enrolled in the participating eligible institution. (e) Supplement, not supplant Funds made available under section 499U to carry out this subpart shall be used to supplement, and not supplant, other Federal, State, tribal, and local funds that would otherwise be expended to carry out activities under this subpart. 499T. Definitions In this subpart: (1) Alaska native-serving institution The term Alaska Native-serving institution has the meaning given such term in section 317(b). (2) Asian american and native american pacific islander-serving institution The term Asian American and Native American Pacific Islander-serving institution has the meaning given such term in section 371(c). (3) Eligible student The term eligible student means a student, regardless of age, who— (A) is enrolled in an eligible program (as defined in section 481(b)) at a participating eligible institution, on at least a half-time basis