Recognition of socially and educationally backward classes: Central lists govern central purposes while states may maintain differing lists. Article 342A empowers the President to notify which entries in the Central List are deemed socially and educationally backward for a State or Union territory; Parliament alone may include or exclude classes from that Central List by law, and the Central List is prepared and maintained by the Central Government. Separately, each State or Union territory may, by law, prepare and maintain its own list of socially and educationally backward classes that may differ from the Central List.