States like Punjab, Haryana, Andhra Pradesh, and Tamil Nadu have tried sub-quotas but faced legal stumbling blocks. The process of sub-categorisation will not be easy, and it should be done justly. The verdict has prescribed that it must be based on “quantifiable and demonstrable data by the states, which cannot act on their whims”.
This is a challenging task. There are over 1,000 SC communities. Their relative backwardness will have to be determined with the help of accepted tools and yardsticks. These may not be confined to representation in government and educational attainments.
The court made a mention of social position, and that too will have to be assessed in relative terms. The relevance of state sub-quotas for reservation at the national level, if they are to be extended there, will have to be addressed because the status of the same group may differ from state to state.