If you see their official website then it is written over there :

Basic eligibility for the programme is a pass at the +2 level (Karnataka PUC / ISC / CBSE / NIOS / State Boards) in any stream with minimum of 45% (Humanities, Social Sciences, Commerce & Management, Sciences) from any recognised Board in India.

Candidates writing the +2 examinations in March-May 2020 may apply with their class X and XI marks.

Students pursuing International curriculum must note that eligibility is according to AIU stipulations:

Applicants pursuing IB curriculum must have 3 HL and 3 SL with 24 credits.

Applicants pursuing GCE / Edexcel must have a minimum of 3 A levels grade not less than C.

Source: https://christuniversity.in/school-of-law/school-of-law/bachelor-of-law-bba/1184