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the member states are the masters of the treaties and their commitment to these treaties is founded on their resolve to accept long-term membership; of course in the final analysis- according to doctrine at least- they can suspend this by an act to the contrary, an actus contrarius.
gli stati membri sono fautori dei trattati, ai quali li vincola la volontà di aderire a lungo termine, adesione dalla quale in ultima analisi possono naturalmente- perlomeno secondo i principi teorici- recedere in qualsiasi momento mediante un atto opposto, un actus contrarius.