List and explain the "constitutional limitations" when drafting a "criminal statute".

1. Ex Post Factois the limitations with regards to future which means they cannot be taking effect on the time that is in the past. 2. Bills of Attainder is another drawback that law cannot inflict sentence or punishment without the involvement of judicial setup. 3. The petition of Habeas Corpus Writs determining the existence of lawful detention by government. 4. Freedom of speech which limits the government in the regulating the manner of speech and other aspects of speech. 5. Government unable to deny due process rights. 6. Equal Protection Clause, this limitation can bring chaos if the classification is unreasonable.