What was the significance of the Constitution (Seventh Amendment) Act, 1956, in Rajya Sabha's composition?

The Seventh Amendment Act, 1956 was crucial as it:

• Replaced the original Fourth Schedule with a new allocation.
  
  
• Reflected changes due to the States Reorganisation Act, 1956.
  
  
• Increased the total elected seats from 204 to 220.
  
  
• Provided representation to new States and adjusted representation of existing ones based on reorganised boundaries and population.