Schedule for Class 12th Standard Indian School Certificate (for General Candidates) and Certificate of Vocational Education (for Vocational) Annual final Examination tests. The Indian School Certificate annual Public Examination tests (ISC) are administered by the Council for the Indian School Certificate Examinations.onepost.in Schedule for Class 12th Standard Indian School Certificate (for General Candidates) and Certificate of Vocational Education (for Vocational) Annual final Examination tests. The Indian School Certificate annual Public Examination tests (ISC) are administered by the Council for the Indian School Certificate Examinations.