Justice Scalia
delivered the opinion of the Court.
This case presents the question whether international air carriers lose the benefit of the limitation on damages for passenger injury or death provided by the multilateral treaty known as the Warsaw Convention if they fail to provide notice of that limitation in the 10-point type size required by a private accord among carriers, the Montreal Agreement.
I
On September 1, 1983, over the Sea of Japan, a military aircraft of the Soviet Union destroyed a Korean Air Lines, Ltd. (KAL), Boeing 747 en route from Kennedy Airport in New York to Seoul, South Korea. All 269 persons on board the plane perished. Survivors of the victims filed wrongful-death actions against KAL in several Federal District Courts, all of which were transferred for pretrial proceedings to the District Court for the District of Columbia pursuant to 28 U. S. C. § 1407. All parties agree that their rights are governed by the Warsaw Convention, a multilateral treaty [124]*124governing the international carriage of passengers, baggage, and cargo by air. Convention for the Unification of Certain Rules Relating to International Transportation by Air, Oct. 12, 1929, 49 Stat. 3000, T. S. No. 876 (1934), reprinted in note following 49 U. S. C. App. § 1502.
The present controversy centers on the per passenger damages limitation for personal injury or death. This was fixed at approximately $8,300 by the Convention, but was raised to $75,000 by the Montreal Agreement, an agreement among carriers executed (and approved by the Civil Aeronautics Board (CAB)) in 1966, and joined by KAL in 1969. Agreement Relating to Liability Limitations of the Warsaw Convention and the Hague Protocol, CAB Agreement 18900, note following 49 U. S. C. App. § 1502 (approved by CAB Order E-23680, May 13, 1966, 31 Fed. Reg. 7302). In addition to providing for a higher damages limitation, this agreement required carriers to give passengers written notice of the Convention’s damage limitations in print size no smaller than 10-point type. The notice of the Convention’s liability rules printed on KAL’s passenger tickets for the flight in question here appeared in only 8-point type. By motion for partial summary judgment, plaintiffs sought a declaration that this discrepancy deprived KAL of the benefit of the damages limitation.
On July 25, 1985, the District Court for the District of Columbia denied the motion, finding that neither the Warsaw Convention nor the Montreal Agreement prescribes that the sanction for failure to provide the required form of notice is the elimination of the damages limitation. In re Korean Air Lines Disaster of September 1, 1983, 664 F. Supp. 1463. Its opinion specifically considered and rejected contrary Second Circuit precedent. See In re Air Crash Disaster at Warsaw, Poland, on March 14, 1980, 705 F. 2d 85, cert. denied sub nom. Polskie Linie Lotnicze v. Robles, 464 U. S. 845 (1983). On September 24, 1985, the District Court certified for interlocutory appeal under 28 U. S. C. § 1292(b) (1982 ed., Supp. [125]*125IV) the question whether KAL “is entitled to avail itself of the limitation of damages provided by the Warsaw Convention and Montreal Agreement despite its defective tickets.” The District of Columbia Circuit allowed the appeal and (following a remand of the record for clarification of the scope of the District Court’s order) affirmed, adopting the District Court’s opinion in full. In re Korean Air Lines Disaster of September 1, 1983, 265 U. S. App. D. C. 39, 829 F. 2d 1171 (1987). We granted certiorari, 485 U. S. 986 (1988), to resolve the conflict among the Courts of Appeals. (In addition to the Second Circuit, the Fifth is in disagreement with the District of Columbia Circuit’s resolution here. See In re Air Crash Disaster Near New Orleans, Louisiana, on July 9, 1982, 789 F. 2d 1092 (1986), reinstated, 821 F. 2d 1147 (1987) (en banc).)
II
Petitioners concede that by itself the Montreal Agreement imposes no sanction for failure to comply with its 10-point type requirement.1 They argue, however, that such a re[126]*126quirement is created by reading the Montreal Agreement in conjunction with the Warsaw Convention. This argument proceeds in two steps. First, petitioners assert that Article 3 of the Warsaw Convention removes the protection of limited liability if a carrier fails to provide adequate notice of the Convention’s liability limitation in its passenger tickets. Second, they contend that the Montreal Agreement’s 10-point type requirement supplies the standard of adequate notice under Article 3. Because we reject the first point, we need not reach the second.2
Article 3 of the Warsaw Convention provides:
“(1) For the transportation of passengers the carriers must deliver a passenger ticket which shall contain the following particulars:
“(a) The place and date of issue;
“(b) The place of departure and of destination;
[127]*127“(c) The agreed stopping places, provided that the carrier may reserve the right to alter the stopping places in case of necessity, and that if he exercises that right, the alteration shall not have the effect of depriving the transportation of its international character;
“(d) The name and address of the carrier or carriers;
“(e) A statement that the transportation is subject to the rules relating to liability established by this convention.
“(2) The absence, irregularity, or loss of the passenger ticket shall not affect the existence or the validity of the contract of transportation, which shall none the less be subject to the rules of this convention. Nevertheless, if the carrier accepts a passenger without a passenger ticket having been delivered he shall not be entitled to avail himself of those provisions of this convention which exclude or limit his liability.”
Although Article 3(1)(e) specifies that a passenger ticket shall contain “[a] statement that the transportation is subject to the rules relating to liability established by this convention,” nothing in Article 3 or elsewhere in the Convention imposes a sanction for failure to provide an “adequate” statement. The only sanction in Article 3 appears in the second clause of Article 3(2), which subjects a carrier to unlimited liability if it “accepts a passenger without a passenger ticket having been delivered.” Several courts have equated nondelivery of a ticket, for purposes of this provision, with the delivery of a ticket in a form that fails to provide adequate notice of the Warsaw limitation. See In re Air Crash Disaster Near New Orleans, Louisiana, on July 9, 1982, supra; In re Air Crash Disaster at Warsaw, Poland, on March 11, 1980, 705 F. 2d 85 (CA2), cert. denied sub nom. Polskie Linie Lotnicze v. Robles, 464 U. S. 845 (1983); Deutsche Lufthansa Aktiengesellschaft v. CAB, 156 U.
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Justice Scalia
delivered the opinion of the Court.
This case presents the question whether international air carriers lose the benefit of the limitation on damages for passenger injury or death provided by the multilateral treaty known as the Warsaw Convention if they fail to provide notice of that limitation in the 10-point type size required by a private accord among carriers, the Montreal Agreement.
I
On September 1, 1983, over the Sea of Japan, a military aircraft of the Soviet Union destroyed a Korean Air Lines, Ltd. (KAL), Boeing 747 en route from Kennedy Airport in New York to Seoul, South Korea. All 269 persons on board the plane perished. Survivors of the victims filed wrongful-death actions against KAL in several Federal District Courts, all of which were transferred for pretrial proceedings to the District Court for the District of Columbia pursuant to 28 U. S. C. § 1407. All parties agree that their rights are governed by the Warsaw Convention, a multilateral treaty [124]*124governing the international carriage of passengers, baggage, and cargo by air. Convention for the Unification of Certain Rules Relating to International Transportation by Air, Oct. 12, 1929, 49 Stat. 3000, T. S. No. 876 (1934), reprinted in note following 49 U. S. C. App. § 1502.
The present controversy centers on the per passenger damages limitation for personal injury or death. This was fixed at approximately $8,300 by the Convention, but was raised to $75,000 by the Montreal Agreement, an agreement among carriers executed (and approved by the Civil Aeronautics Board (CAB)) in 1966, and joined by KAL in 1969. Agreement Relating to Liability Limitations of the Warsaw Convention and the Hague Protocol, CAB Agreement 18900, note following 49 U. S. C. App. § 1502 (approved by CAB Order E-23680, May 13, 1966, 31 Fed. Reg. 7302). In addition to providing for a higher damages limitation, this agreement required carriers to give passengers written notice of the Convention’s damage limitations in print size no smaller than 10-point type. The notice of the Convention’s liability rules printed on KAL’s passenger tickets for the flight in question here appeared in only 8-point type. By motion for partial summary judgment, plaintiffs sought a declaration that this discrepancy deprived KAL of the benefit of the damages limitation.
On July 25, 1985, the District Court for the District of Columbia denied the motion, finding that neither the Warsaw Convention nor the Montreal Agreement prescribes that the sanction for failure to provide the required form of notice is the elimination of the damages limitation. In re Korean Air Lines Disaster of September 1, 1983, 664 F. Supp. 1463. Its opinion specifically considered and rejected contrary Second Circuit precedent. See In re Air Crash Disaster at Warsaw, Poland, on March 14, 1980, 705 F. 2d 85, cert. denied sub nom. Polskie Linie Lotnicze v. Robles, 464 U. S. 845 (1983). On September 24, 1985, the District Court certified for interlocutory appeal under 28 U. S. C. § 1292(b) (1982 ed., Supp. [125]*125IV) the question whether KAL “is entitled to avail itself of the limitation of damages provided by the Warsaw Convention and Montreal Agreement despite its defective tickets.” The District of Columbia Circuit allowed the appeal and (following a remand of the record for clarification of the scope of the District Court’s order) affirmed, adopting the District Court’s opinion in full. In re Korean Air Lines Disaster of September 1, 1983, 265 U. S. App. D. C. 39, 829 F. 2d 1171 (1987). We granted certiorari, 485 U. S. 986 (1988), to resolve the conflict among the Courts of Appeals. (In addition to the Second Circuit, the Fifth is in disagreement with the District of Columbia Circuit’s resolution here. See In re Air Crash Disaster Near New Orleans, Louisiana, on July 9, 1982, 789 F. 2d 1092 (1986), reinstated, 821 F. 2d 1147 (1987) (en banc).)
II
Petitioners concede that by itself the Montreal Agreement imposes no sanction for failure to comply with its 10-point type requirement.1 They argue, however, that such a re[126]*126quirement is created by reading the Montreal Agreement in conjunction with the Warsaw Convention. This argument proceeds in two steps. First, petitioners assert that Article 3 of the Warsaw Convention removes the protection of limited liability if a carrier fails to provide adequate notice of the Convention’s liability limitation in its passenger tickets. Second, they contend that the Montreal Agreement’s 10-point type requirement supplies the standard of adequate notice under Article 3. Because we reject the first point, we need not reach the second.2
Article 3 of the Warsaw Convention provides:
“(1) For the transportation of passengers the carriers must deliver a passenger ticket which shall contain the following particulars:
“(a) The place and date of issue;
“(b) The place of departure and of destination;
[127]*127“(c) The agreed stopping places, provided that the carrier may reserve the right to alter the stopping places in case of necessity, and that if he exercises that right, the alteration shall not have the effect of depriving the transportation of its international character;
“(d) The name and address of the carrier or carriers;
“(e) A statement that the transportation is subject to the rules relating to liability established by this convention.
“(2) The absence, irregularity, or loss of the passenger ticket shall not affect the existence or the validity of the contract of transportation, which shall none the less be subject to the rules of this convention. Nevertheless, if the carrier accepts a passenger without a passenger ticket having been delivered he shall not be entitled to avail himself of those provisions of this convention which exclude or limit his liability.”
Although Article 3(1)(e) specifies that a passenger ticket shall contain “[a] statement that the transportation is subject to the rules relating to liability established by this convention,” nothing in Article 3 or elsewhere in the Convention imposes a sanction for failure to provide an “adequate” statement. The only sanction in Article 3 appears in the second clause of Article 3(2), which subjects a carrier to unlimited liability if it “accepts a passenger without a passenger ticket having been delivered.” Several courts have equated nondelivery of a ticket, for purposes of this provision, with the delivery of a ticket in a form that fails to provide adequate notice of the Warsaw limitation. See In re Air Crash Disaster Near New Orleans, Louisiana, on July 9, 1982, supra; In re Air Crash Disaster at Warsaw, Poland, on March 11, 1980, 705 F. 2d 85 (CA2), cert. denied sub nom. Polskie Linie Lotnicze v. Robles, 464 U. S. 845 (1983); Deutsche Lufthansa Aktiengesellschaft v. CAB, 156 U. S. App. D. C. 191, 196-197, 479 F. 2d 912, 917-918 (1973); Lisi v. Alitalia-Linee Aeree Italiane, S. p. A., 370 F. 2d 508 (CA2 1966), aff’d by [128]*128equally divided Court, 390 U. S. 455 (1968); Egan v. Kollsman Instrument Corp., 21 N. Y. 2d 160, 234 N. E. 2d 199 (1967), cert. denied, 390 U. S. 1039 (1968). See also Warren v. Flying Tiger Line, Inc., 352 F. 2d 494 (CA9 1965) (conditioning liability limitation upon delivery of tickets in such manner as to afford passengers a reasonable opportunity to take measures to protect against liability limitation); Mertens v. Flying Tiger Line, Inc., 341 F. 2d 851 (CA2) (same), cert. denied, 382 U. S. 816 (1965). But see Ludecke v. Canadian Pacific Airlines, Ltd., 98 D. L. R. 3d 52, 57 (Can. 1979) (rejecting the view of the American cases).
We cannot accept this interpretation. All that the second sentence of Article 3(2) requires in order to avoid its sanction is the “delivery]” of “a passenger ticket.” Expanding this to mean “a passenger ticket in compliance with the requirements of this Convention” is rendered implausible by the first sentence of Article 3(2), which specifies that “[t]he . . . irregularity ... of the passenger ticket shall not affect the existence or the validity of the contract of transportation, which shall none the less be subject to the rules of this convention.” It is clear from this (1) that an “irregularity” does not prevent a document from being a “passenger ticket”; and (2) that an “irregularity” in a passenger ticket does not eliminate the contractual damages limitation provided for by the Convention. “Irregularity” means the “[qjuality or state of not conforming to rule or law,” Webster’s Second International Dictionary (1950), and in the present context the word must surely refer to the rules established by the Convention, including the notice requirement. Thus, a delivered document does not fail to qualify as a “passenger ticket,” and does not cause forfeiture of the damages limitation, merely because it contains a defective notice. When Article 3(2), after making this much clear, continues (in the second sentence) “Nevertheless, if a carrier accepts a passenger without a passenger ticket having been delivered, etc.,” it can only be referring to the carrier’s failure to deliver any document whatever, or its [129]*129delivery of a document whose shortcomings are so extensive that it cannot reasonably be described as a “ticket” (for example, a mistakenly delivered blank form, with no data filled in). Quite obviously, the use of 8-point type instead of 10-point type for the liability limitation notice is not a shortcoming of such magnitude; indeed, one might well select that as a polar example of what could not possibly prevent a document from being a ticket.3
[130]*130Besides being incompatible with the language of the Convention, the proposition that, for purposes of Article 3(2), delivering a defective ticket is equivalent to failure to deliver a ticket, produces absurd results. It may seem reasonable enough that a carrier “shall not be entitled to avail himself of those provisions of this convention which exclude or limit his liability” when the ticket defect consists precisely of a failure to give the passenger proper notice of those provisions. But there is no textual basis for limiting the “defective-ticket-is-no-ticket” principle to that particular defect. Thus, the liability limitation would also be eliminated if the carrier failed to comply, for example, with the requirement of Article 3(1 )(d) that the ticket contain the address of the carrier.
The conclusion that defective compliance with the notice provision does not eliminate the liability limitation is confirmed by comparing Article 3(2) with other provisions of the Convention. Article 3 is a part of Chapter II of the Conven[131]*131tion, entitled “Transportation Documents.” Just as Section I of that Chapter (which includes Article 3) specifies what information must be included in passenger tickets, Sections II and III specify what information must be included in, respectively, baggage checks and air waybills for cargo. All three sections require, in identical terms, “[a] statement that the transportation is subject to the rules relating to liability established by this convention.” Articles 3(l)(eJ, 4(2)(h), 8(q). All three sections also provide, again in identical terms, that if the relevant document (ticket, baggage check, or air waybill) has not been delivered (or, in the case of air waybill, “made out”), the carrier “shall not be entitled to avail himself of the provisions of this convention which exclude or limit his liability.” Articles 3(2), 4(4), and 9. But, unlike Section I, Sections II and III also specifically impose the latter sanction for failure to include in the documents certain particulars, including (though not limited to) the notice of liability limitation.4 Sections II and III thus make doubly clear what the [132]*132text of Article 3(2) already indicates: that delivery of a defective document is something quite different from failure to deliver a document. And given the parallel structures of these provisions it would be a flouting of the text to imply in [133]*133Section I a sanction not only withheld there but explicitly granted elsewhere. When such an interpretation is allowed, the art of draftsmanship will have become obsolete.
Petitioners and the United States as amicus curiae seek to explain the variance between Section I and Sections II and III (as well as the clear text of Article 3) as a drafting error, and lead us through the labyrinth of the Convention’s drafting history in an effort to establish this point. It would be absurd, they urge, for defective notice to eliminate liability limits on baggage and air freight but not on personal injury and death. Perhaps not. It might have been thought, by the representatives from diverse countries who drafted the Convention in 1925 and 1929 (an era when even many States of this country had relatively low limits on wrongful-death recovery) that the $8,300 maximum liability established for personal injury or death was a “fair” recovery in any event, so that even if the defective notice caused the passenger to forgo the purchase of additional insurance, he or his heirs would be treated with rough equity in any event. Cf. C. McCormick, Law of Damages § 104 (1935) (“In about one-third of the states, a fixed limit upon the recovery under the Death Act is imposed in the statute. The usual limit is $10,000, but in some instances the maximum is $7,500 or $5,000”). Quite obviously, however, the limitation of liability for baggage and freight (about $16.50 per kilogram, see Article 22(2)) was not set with an eye to fair value (the very notion of a “fair” average value of goods per kilogram is absurd), but perhaps with an eye to fair level of liability in relation to profit on the carriage — so that the shipper of lost goods misled by the inadequate notice would not be compensated equitably. Another possible explanation for the difference in treatment is that the limitations on liability prescribed for baggage and freight are much more substantial and thus notice of them is much more important. They include not just a virtually nominal monetary limit, but also total exclusion of liability for “an error in piloting, in the handling of the aircraft, or in naviga[134]*134tion.” Article 20. Or perhaps the difference in treatment can be traced to a belief that people were much more likely, if adequate notice was given, to purchase additional insurance on goods than on their own lives — not only because baggage and freight are lost a lot more frequently than passengers, but also because the Convention itself establishes, in effect, an insurance-purchasing counter at the airport for baggage and freight, providing that if the consignor makes “a special declaration of the value at delivery and has paid a supplementary sum if the case so requires,” the carrier will be liable for actual value up to the declared sum. Article 22(2); see also Articles 4(g), 8(to).
These estimations of what the drafters might have had in mind are of course speculation, but they suffice to establish that the result the text produces is not necessarily absurd, and hence cannot be dismissed as an obvious drafting error. We must thus be governed by the text — solemnly adopted by the governments of many separate nations — whatever conclusions might be drawn from the intricate drafting history that petitioners and the United States have brought to our attention. The latter may of course be consulted to elucidate a text that is ambiguous, see, e. g., Air France v. Saks, 470 U. S. 392 (1985). But where the text is clear, as it is here, we have no power to insert an amendment.5 As Justice Story wrote for the Court more than a century and a half ago:
[135]*135“[T]o alter, amend, or add to any treaty, by inserting any clause, whether small or great, important or trivial, would be on our part an usurpation of power, and not an exercise of judicial functions. It would be to make, and not to construe a treaty. Neither can this Court supply a casus omissus in a treaty, any more than in a law. We are to find out the intention of the parties by just rules of interpretation applied to the subject matter; and having found that, our duty is to follow it as far as it goes, and to stop where that stops — whatever may be the imperfections or difficulties which it leaves behind.” The Amiable Isabella, 6 Wheat. 1, 71 (1821).
For the reasons given above, we agree with the opinion of the Supreme Court of Canada, see Ludecke v. Canadian Pacific Airlines, Ltd., 98 D. L. R. 3d 52 (1979), that the Warsaw Convention does not eliminate the limitation on damages for passenger injury or death as a sanction for failure to provide adequate notice of that limitation. Accordingly, we affirm the judgment of the District of Columbia Circuit.
So ordered.