Option 1 is incorrect. According to the provisions of the Constitution of India, both the Parliament and State Legislatures have the power to legislate over subjects under the Concurrent List. The Concurrent List contains subjects on which both the central government and state governments can make laws.

Option 2 is correct. Both the Parliament and State Legislatures have the power to legislate over subjects under the Concurrent List. This means that both levels of government can make laws on these subjects.

Option 3 is incorrect. A legislation made under the Concurrent List by Parliament does not need to be ratified by half of the State Legislatures to become a law of the country. Once Parliament passes a law on a subject under the Concurrent List, it becomes law for the entire country.

Option 4 is incorrect. State Legislatures are not the only ones empowered to make laws under the Concurrent List. The Parliament also has the power to make laws on these subjects.