NCS will come into existence for conducting a common tier 1 exam for various levels based on qualifications of candidates for example a single tier 1 for graduate level examination, another level for 12th and another for 10th pass candidates. after appearing for the NCS of their qualifications they will receive a scorecard with a validity of 2 year. through which they can Appear for various tier 2 exams if they clear the cutoffs. the cutoffs will depend upon the tier 2 exam conducting department. in short we can say that there will be a single tier 1 for ssc cgl & cpo which can include more exams like railway graduate level exams.