Perpetual and Temporary Statutes; Effect of Expiry — Interpretation of Statutes Notes

Perpetual and Temporary Statutes; Effect of Expiry

During the Second World War, Britain passed emergency laws that were to last only “for the duration”. After the war a man was prosecuted for an offence he had committed while such a temporary Act was alive, but tried after it had expired. Could he still be convicted? In Wicks v Director of Public Prosecutions (1947) the House of Lords said yes — because the temporary Act itself had saved liabilities incurred during its life. The case shows the whole trick of temporary statutes: what happens on expiry depends entirely on whether the Act saved anything.

What are perpetual and temporary statutes?

Statutes divide by how long they live:

• A perpetual (permanent) statute has no fixed end-date. It remains in force until the legislature repeals it. “Perpetual” does not mean unchangeable — only that it does not expire by itself. Most Acts (the Contract Act, the IPC) are perpetual.

• A temporary statute is one whose duration is fixed in advance — it is expressed to remain in force only for a specified period (e.g. “this Act shall remain in force for two years”), or until a stated event, or until an expiry the Act itself names. When that period ends, the Act expires automatically, without any repealing Act.

The key difference in effect — expiry vs repeal. This is the examiner’s target.

1. A perpetual statute ends only by repeal, and on repeal s.6 of the General Clauses Act automatically saves accrued rights and pending prosecutions (Topic 4).

2. A temporary statute ends by expiry, and — this is the catch — s.6 GCA does NOT apply to expiry; s.6 speaks only of “repeal”. So on the ordinary rule, once a temporary Act expires:

   • no fresh prosecution can be started for an offence committed while it was in force; and
   • pending proceedings under it lapse — unless saved.

3. The saving depends on the Act itself. A temporary Act very often contains its own saving clause (“expiry shall not affect liabilities already incurred”), or the offence is treated as complete when committed. Where the Act saves such liabilities, prosecutions survive expiry (as in Wicks). Where it is silent, the general rule bites and prosecutions fall.

Other effects of expiry. Rights and obligations that had already accrued under a temporary Act may or may not survive depending on the saving; and any subordinate legislation (rules) made under it normally lapses with it. If the temporary Act is continued by a fresh Act before it expires, it lives on without a break.

⚠️ Do not apply s.6 GCA to a temporary statute’s expiry. Section 6 is a savings provision for repeal only. For expiry, look to the Act’s own saving clause.

The rule (Craies/Wicks principle): “As a general rule, and unless it contains some special provision to the contrary, after a temporary Act has expired no proceedings can be taken upon it, and it ceases to have any further effect.”

In Simple Terms: A perpetual statute lasts till repealed; a temporary one dies on its own expiry date. The difference that matters: s.6 GCA saves rights and prosecutions on a repeal, but not on an expiry — so after a temporary Act expires you can prosecute only if the Act itself saved that liability.

🧩 WORKED EXAMPLE — Prosecution after expiry

Facts. A temporary Act, in force 2020–2022, makes hoarding an offence. X hoards in 2021. The Act expires on 31 December 2022. In 2023 the State launches a fresh prosecution. The Act contains no saving clause.

Rule. On expiry of a temporary Act, and in the absence of a saving clause, no fresh prosecution may be launched for an offence committed during its life; s.6 GCA (which would save it on a repeal) does not apply to expiry.

Apply. X’s offence was committed in 2021 while the Act lived, but the Act expired in 2022 with no saving provision, and the prosecution begins only in 2023 — after death of the Act.

Conclusion. The 2023 prosecution cannot be maintained. It would succeed only if the Act had contained a saving clause preserving liabilities incurred during its currency.

flowchart TD
    ROOT["Statutes by duration"]:::root
    ROOT --> A["Perpetual<br/>no end-date; ends only by repeal"]:::leaf
    ROOT --> B["Temporary<br/>fixed period; expires by itself"]:::leaf
    A --> A1["On repeal: s.6 GCA saves rights & prosecutions"]:::leaf
    B --> B1["On expiry: s.6 GCA does NOT apply"]:::leaf
    B1 --> B2{"Does the Act have a saving clause?"}:::dec
    B2 -->|"Yes"| B3["Liabilities & prosecutions survive"]:::leaf
    B2 -->|"No"| B4["No fresh prosecution; pending cases lapse"]:::leaf
    classDef root fill:#FFF8DC,stroke:#000,stroke-width:1px,color:#000;
    classDef leaf fill:#E6F3FF,stroke:#1E3A8A,color:#000;
    classDef dec fill:#FFE8C2,stroke:#B45309,color:#000;
    linkStyle default stroke:#888,stroke-width:1px;

Case Laws

• Wicks v Director of Public Prosecutions (1947) — a prosecution for an offence under a temporary Act may continue after expiry where the Act itself preserves liabilities incurred during its life.
• S. Krishnan v State of Madras (1951) — the effect of expiry of a temporary (Preventive Detention) Act depends on the Act’s own provisions; a continuance provision keeps it alive.
• State of Punjab v Mohar Singh (1955) — contrasts repeal (s.6 GCA savings apply) with expiry (they do not), underlining that the source of survival differs.

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