Consider the following statements in the context of Doctrine of Colourable Legislation:
1. It holds that the union and state legislatures should not encroach upon each other's domain.
2. The courts will look into the object of the law and not motives of the legislatures while deciding on its validity.
3. State legislature is barred from re-enacting the same law if the statute is found to be invalid due to legislative incompetence.
How many of the above statements are correct?