The University Interscholastic League (UIL) rules govern all inter-school contests in athletics (both boys and girls), speech, journalism, literary events, drama, and music. These rules are available at: http://www.utexas.edu/admin/uil/admin/pro.

A student has only four years of eligibility for all UIL-sanctioned events beginning with the first semester he is classified as grade 9, any student who is beginning his fifth year of high school would be ineligible for all UIL-sanctioned events or activities regardless of credits earned. This provision does not apply to extracurricular activities which are not sanctioned by the UIL.
 
A student whose recorded grade average in any course is lower than 70 at the end of a grading period shall be suspended from participation in any UIL/extracurricular activity. Some exceptions apply refer to the complete listing of UIL rules and regulations.