Hello student yes you can appear in rulet for sure as there's no upper age limit. Eligibility criteria says - Candidates must passed class 12 in any stream with minimum Mark's aggregate from a recognized board.

In case of sc/st the minimum percentage in class 12 is 45 percent.

Apart from RULET you can also apply for CLAT which is  a national level entrance examination for admission into 21 National law University across India.

For more updates on RULET refer to the link mentioned below.

https://law.careers360.com/exams/rulet

Feel free to comment if you have any doubt

Good luck