Special Provisions
(1) The President may (and must, 10 years after the Constitution's commencement) appoint a Commission to report on Scheduled Areas administration and Scheduled Tribes welfare in the states, defining its composition/powers/procedure. (2) The Union's executive power extends to directing a State on drawing up and executing schemes essential for Scheduled Tribes welfare there.
This gives the Union both an investigative tool (a periodic review Commission) and a direct power (issuing binding directions to states) specifically to ensure Scheduled Tribes welfare and Scheduled Areas administration don't fall through the cracks of ordinary state governance, reflecting the Union's special responsibility for this vulnerable population.
This is part of why the central government maintains active oversight and can direct state governments on Scheduled Tribes welfare schemes, rather than treating this purely as an ordinary state-level administrative matter.