Belton has a beef with the University Interscholastic League. But does it have a case?Big Red will appeal its placement in Class 5A to the UIL's State Conference and District Assignment Review Board. It has until Wednesday to file the written request, and on Feb. 20 it will present its oral argument. That afternoon in Austin, it will know whether it wins or loses. A brief background: Belton school officials say the district's "school of choice," Waskow Leadership Academy, is an autonomous entity that's totally separate from the main high school. Its 94 students, they say, should not be lumped in with the 1,900 figure submitted to the Texas Education Agency