Pith and Substance

In one line

A law is classified by what it is really about, not by what it happens to touch, and an incidental effect on the other level's field does not invalidate it.

In the wording a student can write in an exam: the doctrine of pith and substance requires a court, in determining whether a law is within the competence of the legislature that made it, to ascertain the true nature and character of the enactment as a whole, its object, scope and effect, and to disregard incidental encroachment upon a field assigned to the other level.

Why the doctrine is necessary

Because lists cannot be watertight. Any law of substance touches several subjects: a law about money-lending touches contracts, promissory notes, evidence and civil procedure. If a law failed whenever it touched the other level's field, no legislature could legislate at all.

The doctrine solves it by asking a single question: what is this law really about?

Where it comes from

The Privy Council developed it on appeals from Canada, construing sections 91 and 92 of the British North America Act 1867, and it reached India through appeals under the Government of India Act 1935.

The leading statement for India is Prafulla Kumar Mukherjee v. Bank of Commerce Ltd, Khulna, AIR 1947 PC 60, on the Bengal Money-Lenders Act 1940. The Board held that the extent of the invasion of the federal field is relevant to the question, and that a law in pith and substance on money-lending, a provincial subject, was not invalidated by an incidental effect on promissory notes, a federal subject.

How the doctrine is applied

Step one: identify the impugned law's true nature and character. The court looks at the whole enactment, its object, its scope and its effect. The label the legislature has given it is not decisive.

Step two: allocate it to an entry. If it falls substantially within an entry in the legislature's own List, it is valid.

Step three: disregard incidental encroachment. An effect on the other List does not invalidate, provided the encroachment is incidental and not the substance.

Step four: measure the extent of the invasion. The Privy Council said the extent is relevant, so a law whose incidental effect is so large as to be the real object will not be saved.

Two related doctrines

Colourable legislation. What cannot be done directly cannot be done indirectly. Where a legislature lacking competence enacts a law in a form that pretends to fall within its own field, the court looks at the substance and strikes it down. The maxim is that the doctrine has nothing to do with bona fides or mala fides on the part of the legislature; the question is one of competence alone.