Two maxims sit at the heart of how Indian courts repair the damage their own processes can cause. Actus curiae neminem gravabit — the act of the court shall prejudice no one — commands a court to restore a party harmed by judicial error, delay or an interim order later found wrong. Lex non cogit ad impossibilia — the law does not compel the impossible — relieves a person of a duty that circumstances beyond his control have made impossible to perform. Both are equitable correctives the Supreme Court repeatedly invokes to keep procedure the servant of justice rather than its master. This note traces their meaning, their leading authorities from Jang Singh v Brijlal and A.R. Antulay v R.S. Nayak to South Eastern Coalfields and Cochin State Power, their statutory anchors in the CPC and the Contract Act, and the limits that stop them becoming licences for indiscipline.

Why Two Procedural Maxims Belong Together

Court proceedings are imperfect instruments. Registries miscalculate deposits, judges issue interim orders that appellate courts later reverse, and statutory time-limits expire while a matter sits under judicial custody. The common law answered these recurring injustices with two complementary maxims that Indian courts have absorbed wholesale. Actus curiae neminem gravabit looks backward: it asks the court to undo prejudice that its own action or inaction has caused a litigant. Lex non cogit ad impossibilia looks at the duty itself: it asks whether the law can fairly demand performance that has become impossible. The first is a doctrine of restitution and correction; the second is a doctrine of excuse.

They are grouped under "court proceedings" because each most often surfaces inside litigation — when a party seeks to be put back in the position it occupied before a court erred, or when it pleads that an order or statute cannot be obeyed. For the foundational vocabulary that underpins this whole field, see our introduction to legal maxims; for the broader equitable temper these doctrines share, see maxims relating to justice. The full set sits on the legal maxims hub.

Actus Curiae Neminem Gravabit: Meaning and Foundation

The maxim translates as "an act of the court shall prejudice no man." Its operative idea is that where a court, through error, omission or its own process, causes a party to suffer a loss it would not otherwise have borne, the court is bound to repair that loss and restore the party to its earlier position. The maxim is not a source of substantive right; it is a principle of restitution that prevents the machinery of justice from itself becoming an engine of injustice.

The Supreme Court has repeatedly described the maxim as "founded upon justice and good sense" and as affording "a safe and certain guide for the administration of the law." That formulation was adopted in A.R. Antulay v R.S. Nayak, (1988) 2 SCC 602, where a seven-Judge Bench used the maxim to undo directions the Court itself had earlier issued without jurisdiction. The principle rests on a simple equitable intuition: a litigant should not be made worse off because the institution charged with doing justice slipped. Crucially, the "act of the court" embraces not only the act of a single judge but the act of the entire judicial hierarchy, so an erroneous interim order of a trial court that an appellate court later reverses is still an "act of the court" whose consequences must be reversed.

Jang Singh v Brijlal: The Classic Illustration

The clearest Indian illustration is Jang Singh v Brijlal, AIR 1966 SC 1631. A pre-emption decree required the pre-emptor, Jang Singh, to deposit the purchase price within a fixed time, failing which his suit would stand dismissed. He went to the court office to make the deposit; the official prepared the challan but, through the court's own arithmetical slip, the figure fell short by one rupee. Jang Singh deposited exactly what the court told him to deposit. When the shortfall later came to light, the courts below dismissed his suit on the footing that the full price had not been paid in time, holding they had no power to extend the decretal period in a pre-emption matter.

The Supreme Court reversed. It held that since the deficiency arose entirely from the mistake of the court's own officer — and not from any default of the litigant — the maxim actus curiae neminem gravabit applied, and the deposit had to be treated as a good and sufficient compliance with the decree. The Court reasoned that there was "an obligation on the part of the court to see that the records of the court are not so manipulated and the suitor before it not so dealt with as to make him suffer for no fault of his." Jang Singh remains the textbook example because the facts isolate the principle: a litigant who does exactly as the court directs cannot be penalised when the direction itself was wrong.

A.R. Antulay: Correcting the Court's Own Jurisdictional Error

If Jang Singh shows the maxim correcting a clerical slip, A.R. Antulay v R.S. Nayak, (1988) 2 SCC 602 (also reported as AIR 1988 SC 1531), shows it correcting a far graver judicial error — one made by the Supreme Court itself. In 1984 a Constitution Bench had, by special direction, transferred the corruption trial of the former Maharashtra Chief Minister from the designated Special Court to the High Court. That direction overlooked the exclusive jurisdiction conferred on the Special Court by the Criminal Law Amendment Act, 1952, and deprived the accused of a statutory right of appeal.

When the matter returned, the seven-Judge Bench held the 1984 direction to be per incuriam and a nullity, and invoked actus curiae neminem gravabit to set it aside so that no prejudice flowed to the accused from the Court's own mistake. The decision is doctrinally important for establishing that the maxim can be deployed even against a binding order of the apex court, and that the power to recall a direction made without jurisdiction is inherent and not defeated by the ordinary bar on reviewing one's own judgment. The case also illustrates the maxim's close kinship with the fair-trial guarantees of Articles 14 and 21, since the prejudice the Court undid was the denial of an appellate forum.

Raj Kumar Dey: Excluding Time Lost in Court Custody

A recurring application of the maxim is the exclusion of time during which a party was prevented by the court from acting. In Raj Kumar Dey v Tarapada Dey, (1987) 4 SCC 398, an arbitration award could not be filed and registered within the statutory period because the award was lying in the custody of the court and an injunction restrained the parties from dealing with it. The High Court held the registration time-barred.

The Supreme Court applied actus curiae neminem gravabit together with lex non cogit ad impossibilia and excluded the period during which the award was under judicial custody and the injunction subsisted. Because it was the court's own order that made timely action impossible, the parties could not be penalised for the resulting delay. Raj Kumar Dey is a useful bridge case: it shows the two maxims of this note operating in tandem, the act-of-the-court principle supplying the reason and the impossibility principle supplying the mechanism for relief. The reasoning has since informed how courts treat limitation where compliance was rendered impossible by an interim order — a theme that overlaps with maxims relating to evidence on burden and presumption in procedural disputes.

Restitution and Erroneous Interim Orders

The maxim's most commercially significant modern use lies in restitution following the reversal of an interim order. The leading authority is South Eastern Coalfields Ltd. v State of M.P., (2003) 8 SCC 648. The Supreme Court held that an interim order is always granted on the implicit understanding that the party benefiting from it must, if it ultimately fails, restore the opposite party to the position it would have occupied but for the order. No party can be allowed to retain an unjust enrichment obtained under an interim order that the final judgment shows ought never to have been made.

The Court grounded this in actus curiae neminem gravabit: since the interim order is the act of the court, its eventual reversal must carry restitution of everything gained under it, including interest for the period the order remained in force. The principle is reinforced by the doctrine of restitution in Section 144 of the Code of Civil Procedure, 1908, though the Court made clear that the equitable power to order restitution is wider than the section and flows directly from the maxim. South Eastern Coalfields thus converted a defensive principle into an affirmative basis for recovering money paid, withheld or earned under orders later found wrong.

Karnataka Rare Earth: Restitution Beyond Pure Error

Karnataka Rare Earth v Senior Geologist, Department of Mines and Geology, (2004) 2 SCC 783, extended the restitutionary reach of the maxim. The appellants had removed and sold mineral during a period when an interim order of the court protected them; when that protection fell away, the State sought the price of the mineral. The appellants argued that no restitution lay because they had acted under cover of a court order, not in defiance of one.

The Supreme Court rejected that defence. It held that the obligation to make restitution does not depend on the party having acted wrongfully; it arises whenever a party has gained an advantage under an interim order that the final result shows it was not entitled to. The successful litigant must be "placed in the same position in which he would have been had the court not passed the interim order." The decision confirms that actus curiae neminem gravabit operates objectively — the question is whether prejudice has flowed from the court's act, not whether the beneficiary behaved improperly. This objective character is what allows the maxim to do restitutionary work even where everyone has acted in perfect good faith.

Section 152 CPC and Correction of Court Errors

The same equity that animates the maxim is codified in the power to correct mistakes. Section 152 of the Code of Civil Procedure, 1908 permits a court at any time to correct clerical or arithmetical mistakes in judgments, decrees or orders, and errors arising from any accidental slip or omission. The provision exists precisely so that a litigant is not prejudiced by an unintentional error of the court rather than a deliberate adjudication. Courts have repeatedly described Section 152 as a statutory embodiment of actus curiae neminem gravabit.

The boundary of the power matters. In Master Construction Co. (P) Ltd. v State of Orissa, AIR 1966 SC 1047, the Supreme Court held that Section 152 reaches only accidental slips and clerical or arithmetical errors apparent on the face of the record; it cannot be used to reconsider the merits, to alter the substance of a decision, or to supply a fresh adjudication under the guise of correction. The maxim therefore corrects what the court did not intend, not what it intended but got wrong on the merits — that latter category belongs to appeal or review. Keeping the two apart is what prevents the maxim from undermining the finality of judgments.

Lex Non Cogit Ad Impossibilia: Meaning and Rationale

The second maxim, lex non cogit ad impossibilia, means "the law does not compel the impossible." Broken down, lex is law, non cogit is does not compel, and ad impossibilia is to impossible things. The principle is that a person cannot be held to have failed in a legal duty where performance was genuinely impossible through no fault of his own and over which he had no control. The law, being founded on reason, does not insist on the absurd.

The Supreme Court stated the rule with care in State of M.P. v Narmada Bachao Andolan, (2011) 7 SCC 639: "Where the law creates a duty or charge, and the party is disabled to perform it, without any default in him, and has no remedy over it, there the law will in general excuse him." Two conditions are therefore essential — the impossibility must be real, not merely inconvenient or expensive; and it must arise without the party's own default. A litigant who has manufactured his own incapacity cannot shelter behind the maxim. The doctrine is closely allied to the maxim impotentia excusat legem, "impossibility is an excuse in law," which the courts treat as its near-synonym and frequently cite alongside it.

Cochin State Power: The Foundational Indian Authority

The leading Indian authority establishing the maxim in administrative and statutory contexts is Cochin State Power and Light Corporation Ltd. v State of Kerala, AIR 1965 SC 1688. A statute empowered the State Electricity Board to take over an electricity undertaking after giving notice, and obliged the licensee in turn to deliver the undertaking. The licensee was required by the scheme to perform an act of compliance that, on the facts, the Board's own conduct had made impossible to perform within the stipulated structure.

The Supreme Court applied both lex non cogit ad impossibilia and impotentia excusat legem, holding that where the act of one party (or of the law's own operation) renders compliance impossible for another, the law will not treat the non-performance as a breach or a forfeiture. The Court read the statutory requirement so as not to demand the impossible of the licensee. Cochin State Power is repeatedly cited as the case in which the Indian Supreme Court formally "accepted, approved and applied" these twin maxims, and it remains the anchor for arguments that a statutory time-limit or condition should yield where compliance was objectively impossible.

Impossible Statutory Compliance and Time-Limits

The maxim's most practical modern field is the relaxation of statutory time-limits where compliance was impossible. Where a statute requires a thing to be done within a fixed period, but external circumstances beyond the party's control make that impossible, courts have read the requirement so that the period is effectively extended or the default excused. The principle was applied in Krishnaswamy S.P.D. v Union of India, (2006) 3 SCC 359, where the Supreme Court reiterated that "the law disclaims all intention of compelling impossibilities," and held that a party could not be visited with the consequences of non-compliance where performance within time was not within its power.

This is the principle that surfaced across the country during periods of suspended functioning — such as the limitation extensions ordered during the COVID-19 disruption — and in tax and regulatory matters where a portal, an approval or a precondition outside the assessee's control failed. The thread is constant: the maxim does not abolish the time-limit, it reads a sensible exception into it for cases of genuine, externally caused impossibility. The same reasoning explains why Raj Kumar Dey, discussed above, excluded time lost in court custody — the registration was impossible while the award sat under injunction.

The Maxim in Contract: Frustration and Section 56

In the law of contract the same intuition is codified as the doctrine of frustration. Section 56 of the Indian Contract Act, 1872 declares that an agreement to do an impossible act is void, and that a contract to do an act which afterwards becomes impossible or unlawful, by reason of an event the promisor could not prevent, becomes void when the act becomes impossible or unlawful. Section 56 is, in substance, lex non cogit ad impossibilia reduced to statute.

The classic exposition is Satyabrata Ghose v Mugneeram Bangur and Co., AIR 1954 SC 44, where the Supreme Court held that "impossibility" in Section 56 is not confined to physical or literal impossibility but extends to a supervening event that strikes at the root of the contract and renders its performance impracticable or useless in the sense the parties contemplated. Where such an event occurs without fault of either party, the law excuses performance rather than compelling the impossible. The contractual dimension is developed more fully in our note on maxims relating to contract; here it is enough to see that the procedural maxim and the contractual doctrine of frustration are two faces of the same equitable refusal to demand the undoable.

Limits, Cautions and Misuse

Neither maxim is a roving warrant. Actus curiae neminem gravabit requires a genuine act or omission of the court that has actually prejudiced the party; it cannot rescue a litigant whose loss flows from his own default, his lawyer's negligence, or the ordinary operation of law. The Court in South Eastern Coalfields was careful to tie relief to the reversal of a specific court order and to demonstrable prejudice, not to a general sense of grievance. Nor can the maxim be used to reopen settled merits where there was no court error at all — that boundary is policed by the limits on Section 152 set in Master Construction.

Likewise, lex non cogit ad impossibilia demands true impossibility without the party's default. Difficulty, increased cost, commercial hardship or self-induced incapacity do not qualify; Satyabrata Ghose itself stressed that mere onerousness is not frustration. Courts apply both maxims as exceptional equitable correctives, not as routine escapes from procedural discipline. Read together they express a single mature idea: the legal system must repair the harm its own processes cause and must not demand the impossible — but it owes these indulgences only to the litigant who is himself without fault. For the parallel disciplinary maxims that govern who deserves equity's help, see maxims relating to justice.

Frequently asked questions

What does actus curiae neminem gravabit mean?

It means "an act of the court shall prejudice no one." Where a court, through its own error, delay or interim order later found wrong, causes a party a loss it would not otherwise have suffered, the court must restore that party to its earlier position. The Supreme Court in A.R. Antulay v R.S. Nayak, (1988) 2 SCC 602, called the maxim a principle "founded upon justice and good sense."

Why is Jang Singh v Brijlal the leading example of the maxim?

In Jang Singh v Brijlal, AIR 1966 SC 1631, a pre-emptor deposited exactly the sum the court's officer told him to deposit, but a clerical slip left the figure one rupee short, and the suit was dismissed for non-compliance. The Supreme Court restored the suit, holding that because the shortfall arose from the court's own mistake and not the litigant's default, actus curiae neminem gravabit required that the deposit be treated as good compliance.

How does the maxim apply to interim orders that are later reversed?

In South Eastern Coalfields Ltd. v State of M.P., (2003) 8 SCC 648, the Supreme Court held that any advantage gained under an interim order must be restored if the final judgment shows the order ought not to have been made, because the interim order is itself an act of the court. Karnataka Rare Earth v Senior Geologist, (2004) 2 SCC 783, confirmed that restitution arises objectively, regardless of whether the beneficiary acted wrongfully.

What does lex non cogit ad impossibilia mean?

It means "the law does not compel the impossible." A person cannot be held to have breached a legal duty where performance was genuinely impossible through no fault of his own. In State of M.P. v Narmada Bachao Andolan, (2011) 7 SCC 639, the Court held that where the law creates a duty and the party is disabled from performing it without default and without remedy, the law will in general excuse him. It is allied to impotentia excusat legem.

Can a statutory time-limit be relaxed under lex non cogit ad impossibilia?

Yes, where compliance within the period was objectively impossible for reasons beyond the party's control. Cochin State Power and Light Corporation Ltd. v State of Kerala, AIR 1965 SC 1688, applied the maxim to statutory compliance, and Krishnaswamy S.P.D. v Union of India, (2006) 3 SCC 359, reiterated that "the law disclaims all intention of compelling impossibilities." The time-limit is not abolished; a narrow exception is read into it for genuine impossibility.

How does lex non cogit ad impossibilia relate to frustration of contract?

Section 56 of the Indian Contract Act, 1872 is the statutory form of the maxim: a contract to do an act that later becomes impossible, through an event the promisor could not prevent, becomes void. In Satyabrata Ghose v Mugneeram Bangur and Co., AIR 1954 SC 44, the Supreme Court held that impossibility includes a supervening event striking at the root of the contract, not just physical impossibility — but mere hardship or increased cost does not qualify.