Doctrine of Excessive Delegation

The doctrine of excessive delegation prevents the legislature from transferring its core law-making responsibility to the executive. The legislature must itself perform the essential legislative function of determining policy and laying down a binding standard; executive rules may only implement that policy by supplying details. Thus, delegated legislation is valid, but legislative abdication is not.

Core limit on delegation

An enabling Act must provide sufficient policy, purpose or standards to guide executive rule-making. Guidance may be gathered from the Act's preamble, objectives, scheme and substantive provisions.

• The legislature cannot grant uncontrolled and unguided discretion to decide what the law or policy should be.
• The executive may prescribe administrative details, procedures, conditions and technical standards within the legislative framework.
• The breadth of permissible discretion depends on the subject and context, but the legislature cannot surrender its essential legislative function.

Judicial test

In In re Delhi Laws Act (1951), the Supreme Court established that essential legislative functions cannot be delegated, although implementation details may be entrusted to the executive. In Hamdard Dawakhana v. Union of India (1960), unguided power to expand a statutory prohibition was held invalid.

• Courts examine whether the parent statute discloses a clear policy and provides an intelligible standard for exercising delegated power.
• A delegation is excessive when it effectively permits the executive to make fundamental legislative choices rather than implement choices already made by the legislature.

Legal consequences and related controls

If delegation is excessive, the enabling provision itself may be invalidated. Separately, a rule can be struck down as substantively ultra vires when it exceeds the parent Act or violates the Constitution.

• Under Article 13(3)(a), rules, regulations, notifications and bye-laws fall within the constitutional meaning of law and remain subject to fundamental rights.
• Legislative laying, prior publication and consultation can improve control over rule-making, but they cannot substitute for a legislative policy or guiding standard.