With reference to Goods and Services Tax (GST) Council, consider the following statements:
1. The GST council is periodically constituted by the President of India as and when the issue arises related to GST.
2. The Union Finance Minister is the chairperson of the Council.
3. The decisions of the council are always based on consensus.
4. The recommendations given by the council are binding upon the state and centre.
How many of the above given statements are correct?