There has been precedents where a threat by proposed by a Bill was so serious and imminent, that Court has entertained petition challenging it's constitutionality.
The Principle
If a thing is not prohibited by law, it can be done. There is no bar or prohibition on Courts to receive a petition challenging a Bill. To entertain such a petition or not, is a question for court to decide depending on facts of each case.
Haresh Raichura
22/8/2014