Can we get admission into NIOS Secondary x , without the school leaving certificate for 8th standard.

Because cousin of mine who is 14yrs of age is currently studying Secondary NIOS , but to take the exams he needs 8th standard SLC for eligibility.

but he does not have that since he had stopped going school at 5th standard due to his learning disabilities

Does anyone can guide on how to go about this issue , that is to take the NIOS secondary exam