ARTICLE-4: Non-retroactivity of the present Convention [
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ARTICLE-18: Obligation not to defeat the object and purpose
of a treaty prior to its entry into force [
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ARTICLE-20: Acceptance of and objection to reservations [
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ARTICLE-21: Legal effects of reservations and of objections
to reservations [
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ARTICLE-25: Provisional application [
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ARTICLE-28: Non-retroactivity of treaties [
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ARTICLE-40: Amendment of multilateral treaties [
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ARTICLE-55: Reduction of the parties to a multilateral treaty
below the number necessary for its entry into force [
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ARTICLE-76: Depositaries of treaties [
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ARTICLE-77: Functions of depositaries [
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ARTICLE-80: Registration and publication of treaties [
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