Indian Politics
The parliament can legislate on a subject in the state list

if the legislatures of two or more states recommend to the Parliament to legislate on such a subject
for the implementation of treaties and agreements with foreign powers
All listed here
if the Rajya Sabha passes a resolution by two-third majority declaring the subject in state list of

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Indian Politics
What is the system of Local Self Government in the Panchayati Raj set up?

Single tier set up at village level
Four tier system at the village, block, district and State level
Three tier structure at village, block and district level
Two tier system at village and block level

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