Prafulla Kumar Mukherjee v Bank of Commerce Ltd, Khulna (1947)

This is the case on the doctrine of pith and substance. It was decided under the Government of India Act 1935, but s. 100 of that Act is the direct ancestor of Art. 246 and the three Lists are the same Lists, so the reasoning transfers without adjustment. Every answer on distribution of legislative powers uses it, and the three questions Lord Porter framed are the safest structure to write in.

The Bengal Money-lenders Act 1940 was a Provincial Act. Its s. 30 provided that, notwithstanding anything in any law in force or in any agreement, no borrower should be liable to pay more than a limited sum in respect of principal and interest, or more than a certain percentage of the sum advanced by way of interest. The section was retrospective, and its limits could be relied on by a borrower as a defence to a moneylender's action, or made the basis of a suit by the borrower himself.

The respondents were moneylenders who were also engaged in banking, and the particular loans in issue were secured by promissory notes.

Under s. 100 of the 1935 Act the Federal Legislative List contained:

• Entry 28 — cheques, bills of exchange, promissory notes and other like instruments;
• Entry 33 — corporations, that is to say the incorporation, regulation and winding up of trading corporations including banking;
• Entry 38 — banking, that is to say the conduct of banking business.

The Provincial Legislative List contained Entry 27 — trade and commerce within the Province, and money lending and money-lenders.

Those entries are, in the Constitution, Entries 46, 43 and 45 of List I and Entry 30 of List II. If the Bengal Act had been concerned only with limiting capital and interest recoverable, no objection could have been taken to it.

The respondents said that although they were moneylenders they were also engaged in banking and were holders of promissory notes, matters solely within Federal jurisdiction; that a Provincial Act which dealt with those matters was ultra vires; that the offending matters were so intertwined with the rest of the Act that they could not be separated, so the whole Act was void; and that at the least the Act was void so far as it touched loans secured by promissory notes or made in the course of banking.

The opinion reduces the whole problem to three questions, and they are the best framework for an answer:

1. Does the Act in question deal in pith and substance with money-lending?
2. If it does, is it valid though it incidentally trenches upon matters reserved for the Federal Legislature?
3. Once the pith and substance is determined, is the extent to which the Federal field is invaded a material matter?

Why the doctrine exists at all

Lord Porter adopted the passage of Sir Maurice Gwyer CJ in the Federal Court: it must inevitably happen from time to time that legislation, though purporting to deal with a subject in one list, touches also upon a subject in another list, and the provisions may be so closely intertwined that blind adherence to a strictly verbal interpretation would result in a large number of statutes being declared invalid. Hence the rule evolved by the Judicial Committee, by which the impugned statute is examined to ascertain its pith and substance, or its true nature and character, for the purpose of determining whether it is legislation with respect to matters in this list or in that.

The Board agreed that this describes correctly the ground on which the rule is founded, and that it applies to Indian as well as Dominion legislation. It added the observation that matters the answer often turns on: the overlapping of subject-matter is not avoided by substituting three lists for two, or even by arranging a hierarchy of jurisdictions. Subjects must still overlap. If the pith and substance question could not be asked, much beneficent legislation would be stifled at birth, and many of the subjects entrusted to Provincial legislation could never effectively be dealt with.

Question 1 — money-lending

Every court in India had held the transactions to be in pith and substance money-lending transactions, and the Board agreed. To take a promissory note as security for a loan is the common practice of moneylenders. If a legislature cannot limit a borrower's liability on a promissory note given as security, its power over money-lending is worth little.

Question 3 — the extent of the invasion

This is the answer students most often get wrong. The extent of the invasion into the Federal field is an important matter, but not because validity can be determined by discriminating between degrees of invasion. It matters only as evidence of what the pith and substance is. The provisions may advance so far into Federal territory as to show that the Act's true nature is not concerned with Provincial matters. But the question is not whether it has trespassed more or less; it is whether the trespass, whatever it be, is such as to show that the pith and substance is not money-lending but promissory notes or banking. Once that is determined the Act falls on one side of the line or the other.

What the hierarchy of Lists actually means

The Board then placed the priority of the Lists in perspective, and the passage repays learning because it is the answer to the standard objection that List I always wins. Where the Lists conflict, List I has priority over Lists III and II and List III over List II — but priority in what respect? Does the priority of the Federal Legislature prevent the Provincial Legislature from dealing with any matter which may incidentally affect an item in the Federal List, or must one in each case consider what the substance of an Act is and, whatever its ancillary effect, attribute it to the appropriate list according to its true character? The latter is the true view.

The Bengal Money-lenders Act 1940 is valid, in whole and in part. It is valid because it deals in pith and substance with money-lending — not because the Federal entry on promissory notes is confined to negotiability, a question on which the Board expressly declined to express an opinion. The same answer applies to the banking objection: neither promissory notes nor banking is the substance of the Act, a view supported by its own provisions exempting scheduled and notified banks.

Where a law enacted on a subject within a legislature's competence incidentally trenches on a subject reserved to another legislature, its validity is determined by its pith and substance — its true nature and character — and not by the degree of the incidental encroachment.

• Structure by Lord Porter's three questions. They will carry a problem question on any pair of entries.
• Note the two corollaries that examiners like: incidental encroachment does not invalidate; and the extent of encroachment is evidence of characterisation, never a test of validity in itself.
• Pair it with K. C. Gajapati Narayan Deo on colourable legislation: pith and substance asks what the law really is; colourability asks whether the legislature has done indirectly what it could not do directly. The first is about characterisation, the second about competence; both look to substance rather than form.