The following words and terms, when used in this subchapter, shall have the following meanings, unless the context clearly indicates otherwise:(1) At-Risk Student--An undergraduate student who has one of the following attributes.(A) score on the Scholastic Assessment Test (SAT) or the American College Test (ACT) is less than the national mean score of students' scores on that test;(B) has been awarded a grant under the federal Pell Grant program;(C) was 20 years of age or older on the date the student initially enrolled in the institution;(D) enrolled as a part-time student; and(E) did not receive a high school diploma but received a high school equivalency certificate within the last six years.(2) Commissioner--The Commissioner of Higher Education; as used in this subchapter, "Commissioner" means the agency acting through its executive, and his or her designees, staff, or agents.(3) Coordinating Board--The Texas Higher Education Coordinating Board.(4) Critical Field--Field of engineering, computer science, mathematics, physical science, allied health, nursing, or teacher certification in a field of science or mathematics.(5) Eligible Public Institution--A general academic teaching institution other than a public state college as defined in Texas Education Code, §61.003.