Usually, no. A GST rule made under delegated authority ordinarily takes effect from the date set out in the governing instrument—often its publication in the Official Gazette—and cannot be applied retrospectively unless the parent Act authorizes that result expressly or by necessary implication. To assess a particular rule, read its enabling provision and its commencement language together.
What “before it is notified” can mean
The phrase can refer to different dates in a rule’s lifecycle: when it is made, when it is issued, when it is published in the Official Gazette, and the date on which it says it commences. Those dates are not automatically interchangeable. The instrument’s own wording and the statute that authorizes it determine which date matters.
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In Union of India v. G.S. Chatha Rice Mills, the Supreme Court considered the force of delegated notification and publication. The Delhi High Court’s accessible discussion of that decision states the general principle: delegated legislation ordinarily cannot operate retrospectively without authority in the parent enactment. Delhi High Court judgment Supreme Court judgment
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A rule-maker exercising authority delegated by Parliament or a state legislature is bound by the enabling provision. The Delhi High Court judgment reproduces the Supreme Court’s statement in Hukam Chand v. Union of India: “The extent and amplitude of the rule-making power would depend upon and be governed by the language of the section.” Delhi High Court judgment
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That means a rule or notification cannot ordinarily create a new liability for a period before it took effect unless the parent legislation permits retrospective operation. The authority may be express, or it may arise by necessary implication from the Act; a rule-maker’s own assertion of an earlier date is not, by itself, enough.
How to check the effective date
- Identify the exact instrument. Record the rule or notification number, its version, and the relevant provision. Similar-sounding amendments may have different commencement terms.
- Read the enabling section. Check whether it authorizes retrospective rules or notifications, either in express terms or by necessary implication.
- Read the commencement clause. Note the date the instrument was made or issued, its Official Gazette publication date, and any separate date it specifies for coming into force.
- Check the Gazette publication record. Do not assume an announcement, issue date, or later administrative reference substitutes for the legally relevant publication or commencement date.
- Determine what the rule changes. Consider whether it creates a new liability or instead makes a procedural or clarificatory change; the distinction may matter, but it does not replace examination of the Act and instrument.
- Check the matter’s status. Identify whether the transaction is complete, a proceeding is pending, or the matter is final, and look for any savings clause.
The outcome can depend on the wording of the particular Act and instrument as well as the relevant dates and procedural posture. The general principle does not settle every dispute automatically.
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What the October 2024 CGST amendment illustrates
In Supriya Lifescience Limited v. Union of India, decided by the Bombay High Court on September 11, 2025, the court considered the CGST (Second Amendment) Rules, 2024, including the omission of Rules 89(4B) and 96(10). The judgment records that clause 1(2) made the relevant Rules effective from their publication in the Official Gazette on October 8, 2024. Bombay High Court judgment
The court treated the commencement date separately from what the omissions meant for pending proceedings and transactions already past and closed. Those are distinct questions: the date an amendment comes into force does not, by itself, resolve whether a pending matter or earlier transaction is preserved under a savings provision or applicable repeal principles.
The judgment also rejected the argument that the October 2024 notification remained ineffective until it was laid before Parliament and approved. Section 166 of the CGST Act concerns the laying of rules, regulations, and notifications before Parliament. The case is an illustration tied to its particular notification and facts, not a universal rule for every GST amendment or omission.
The GST Council’s official archive lists central tax notifications and identifies Notification 09/2025 as bringing specified provisions of the CGST (Amendment) Rules, 2024 into force. That listing is a useful pointer to a particular commencement notification, but the notification itself and the parent Act must still be read to determine the effect in a given case. GST Council notification archive
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.What to establish in a specific dispute
- The current official consolidated text of the CGST Act and Rules relevant to the period.
- The exact Gazette notification, including its publication date and any stated commencement date.
- The enabling provision and whether it authorizes retrospective operation.
- The dates of the transaction and any related proceeding, and whether the matter is pending, final, or closed.
- Any savings clause or repeal-related rule that may preserve the operation of the earlier provision.
Without those materials and facts, it is not possible to give a reliable categorical answer for an individual taxpayer’s case. This is a general legal explanation, not advice on a specific dispute.
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