; (ii) as classified by the Carnegie Foundation for the Advancement of Teaching on January 1, 2019, as a doctorate-granting university with a very high or high level of research activity or classified by the National Science Foundation after the date of enactment of this paragraph, pursuant to an application by the institution, as having equivalent research activity to those institutions that had been classified by the Carnegie Foundation as being doctorate-granting universities with a very high or high level of research activity; and (iii) has been in existence for at least 10 years. (F) Full-time The term full-time means— (i) in the case of an individual who is not described in clause (ii), not less than 35 hours per week; or (ii) in the case of an individual who is enrolled in and is in regular attendance at a high school or institution of education within the United States, or who is the primary caregiver of— (I) a child under 18 years of age; or (II) a child 18 years of age or over, spouse, parent, grandparent, or sibling, who is incapable of self-care because of a mental or physical disability or who has a serious injury or illness (as such term is defined in section 101(18) of the Family and Medical Leave Act of 1993 ( 29 U.S.C. 2611(18) )), not less than 20 hours per week.