Tex. Educ. Code § 54.012

The governing board of an institution of higher education may charge a resident doctoral student who has more semester credit hours of doctoral work than allowed for purposes of state funding for the current state fiscal biennium under Section 61.059(l) tuition at the rate charged nonresident doctoral students. Tuition charged at the rate provided by this section shall be accounted for as if collected under Section 54.008.