*♟️Doctrine of Severability:-* declaring only a part of the statute void and not the entire statute. *♟️Doctrine of Harmonius construction:-* see a provision as a part of the whole and not in isolation. *♟️Doctrine of Pith and Substance:-* used in determining legislative competence (Seventh Schedule) *♟️Doctrine of Colourable Legislation:-* A law that cannot be made directly by a legislature cannot be made indirectly.