Your son can get direct admission in 6th standard Sainik School. But to get admitted in 7th standard has to again set in 7th standard CBSE exam. If qualifiers and name comes in the final list then only we will get admitted in 7th standard in the Sainik School. Why qualifying and coming in the final list in 6th standard will not allow him to to take admission in 7th standard in Sainik School. Good Luck !