A repeated practice and an uncertain legal belief
A fictional international-law exercise describes several states repeatedly exchanging a particular diplomatic courtesy. The record includes examples of the conduct but no statement that the states consider the courtesy legally required. Some official correspondence instead calls it a matter of convenience. A learner concludes that repetition alone conclusively establishes a binding customary rule. Another assumes that the absence of a treaty means no international legal rule could ever exist. Students must identify the separate elements of the custom analysis and explain the significance of the limited record without deciding more than the supplied evidence supports. The scenario is fictional and does not identify an actual disputed practice or a complete survey of state behavior.
1. Why is repetition alone insufficient?
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The analysis also requires the relevant acceptance as law. Conduct described as convenience does not automatically establish opinio juris.
2. What further inquiry is needed?
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Examine the nature and generality of practice and evidence of legal acceptance. The absence of a treaty alone does not exclude customary law.