It totally depends upon the course. After you take admission, then only the information regarding the dress code will be furnished. You can visit the official website of RNTU (http://rntu.ac.in/) or contact the university officials if you're specifically looking for the dress code of LLB dep.
The University follows a dress code for different programs and the details about the dress code are provided to students at the time of admission.
Contact the University for details.