Essential Legislative Function: Meaning, What Cannot Be Delegated and Judicial Interpretation

The whole Indian law of delegated legislation rests on one expression: the essential legislative function. The legislature may delegate almost anything to the executive, but not this. Everything therefore depends on what the expression means, and the courts have supplied an answer that is deceptively simple to state and demanding to apply. The essential legislative function is the determination of the policy of the law and its enactment as a binding rule of conduct. What lies within that core cannot be given away; what lies outside it, the detail, the machinery, the working out, may be. This topic examines the concept itself: its content, the matters treated as falling inside and outside it, and how the courts identify it in a given statute.

1. The Concept

The expression entered Indian law through the opinions in In re Delhi Laws Act, 1912, AIR 1951 SC 332, where the judges searched for a formula that would permit the delegation modern government requires while preserving the legislature's constitutional role. The formula they arrived at distinguishes two things a legislature does when it makes a law.

Two elements are contained in the formula, and both must be performed by the legislature. The first is policy: the decision on the object of the law, the mischief it addresses and the principle on which it proceeds. The second is enactment as a binding rule: the conversion of that policy into an operative command of law, so that the statute, and not the delegate's later choice, is the source of the obligation. A statute that announces a policy but leaves the delegate to decide whether and on whom it shall operate has performed the first without the second.

2. What Falls Inside the Essential Function

The following matters have been treated as belonging to the legislature itself, so that their delegation is impermissible.

1. The policy and object of the law. What the statute seeks to achieve, and the principle on which it proceeds, must be the legislature's own determination.
2. The field of operation of the law. Who and what the law covers. A power to enlarge that field without standards, as in Hamdard Dawakhana v. Union of India, AIR 1960 SC 554, where the executive could add diseases to a prohibited list, is a delegation of the essential function.
3. The essentials of a tax. The subject of the levy, the person liable, the measure and the rate must be determined by the legislature or by standards it lays down, since Article 265 requires a tax to be levied by authority of law.
4. The creation of offences and the essentials of penal liability. Whether conduct is criminal, and the range of punishment, are matters for legislative judgment; a delegate may be left to prescribe details but not to decide the existence of liability at large.
5. The repeal or amendment of statutes. A power to undo or rewrite laws enacted by a competent legislature, unconfined by policy, transfers the legislative function itself, as part of the provision considered in Delhi Laws Act was held to do.
6. Any power to change the policy of the Act. Even a valid enabling clause cannot be construed to permit the delegate to alter the essential features of the statute under which it acts.

3. What Falls Outside It

The delegable residue is large, and comprises everything that carries out a policy the legislature has already settled.

• Details and machinery: forms, procedures, registers, fees, time limits and the apparatus of administration.
• Supplying determinate standards: fixing rates, specifications or lists by reference to an ascertainable criterion within a declared policy, as in Gwalior Rayon Silk Mfg. (Wvg.) Co. Ltd. v. Assistant Commissioner of Sales Tax, (1974) 4 SCC 98.
• Application and extension: bringing the Act into force, extending it to areas or classes, or determining the facts on which it operates, which in its pure form is conditional legislation and involves no delegation at all.
• Inclusion and exemption within a declared policy: adding to or exempting from a list where the Act states the principle governing the choice, the feature whose absence was fatal in Hamdard Dawakhana.
• Adaptation and limited modification: adjusting the Act in applying it, provided the adjustment carries out and does not alter its policy.

4. How the Courts Identify the Essential Function

Because no statute announces which of its provisions embody the essential function, the courts identify it by construction, and three working propositions have emerged.

The policy is sought in the Act as a whole. The preamble, long title, objects, scheme and other provisions are all available; the enabling clause need not itself contain a standard. In Harishankar Bagla v. State of Madhya Pradesh, AIR 1954 SC 465, the Supreme Court upheld a broad power to make orders for regulating the production, supply and distribution of essential commodities under the Essential Supplies (Temporary Powers) Act, 1946, finding the policy, namely the maintenance of supplies essential to the community and their equitable distribution at fair prices, in the Act itself, and holding that the delegate was left only to carry it out.

The precision demanded varies with the field. Where the subject is technical, fluctuating or urgent, general guidance suffices, because closer standards would defeat the purpose of delegating. Where the power touches liberty, taxation or penalty, the courts insist on more.

Safeguards may supply control. The requirement that a power be exercised on the recommendation of an expert body, after consultation, by notification laid before the legislature, or subject to review, has been treated as confining the delegate and supporting the conclusion that the legislature retained the essential function. This reasoning carried the majority in Vivek Narayan Sharma v. Union of India, (2023) 3 SCC 1, where the power to demonetise under section 26(2) of the Reserve Bank of India Act, 1934 was upheld partly because it is exercisable only on the recommendation of the Central Board of the Reserve Bank.

5. Inside and Outside the Core

6. The Position in Summary

1. The essential legislative function is the determination of the policy of the law and its enactment as a binding rule of conduct; it is the one thing an Indian legislature cannot delegate.
2. It covers the policy and object of the law, the field it operates on, the essentials of a tax, the creation of offences, the power to repeal or amend statutes, and any power to alter the Act's policy.
3. Outside the core lie details and machinery, determinate standards, application and extension, guided inclusion and exemption, and limited adaptation, all of which may be delegated.
4. The courts identify the core by reading the whole Act for policy, by varying the precision demanded according to the subject, and by treating procedural and institutional safeguards as capable of supplying control.
5. Birla Cotton Mills shows guidance drawn from the scheme and accountability of the delegate, Harishankar Bagla from the objects of the Act, and Hamdard Dawakhana shows what happens when neither is present.

7. Related Topics and Provisions

• Doctrine of Excessive Delegation (Topic 27): the constitutional objection that arises when this core is surrendered.
• In re Delhi Laws Act (Topic 29): the decision in which the concept was formulated.
• Permissible and Impermissible Delegation (Topic 26): the categories on either side of the core.
• Conditional Legislation (Topic 30): the category in which no part of the function is delegated at all.
• Henry VIII Clause (Topic 32): the form of delegation that presses hardest against the core.
• Constitution of India: Articles 245, 246, 265 and the Seventh Schedule.