hello Mahesh, 

                 As per the ministry of human resource amd development the 10% reservation for economically weaker section will be provided from the academic year 2019-20.

            Since the NLU's and NLS do come directly under cemtre government and comes under state government therefore it depends on state government  how when to implement it. Since CLAT2019 is already over so now it depends on how they create the merit list.

 GOOD LUCK