Consider the following statements with respect to the ordinance-making power of the president of India :

1. The ordinances have the same force and effect as an act of Parliament.

2. The President can promulgate an ordinance only when either both or one of the Houses of Parliament are/is not in session.

3. An ordinance can be issued only on those subjects on which the Parliament can make laws.

How many of the statements given above are correct?