declaration · noun C /ˌdek.ləˈreɪ.ʃən/Full view
C1 a statement, often one that is written and official
Dictionary examples:

a declaration of independence/war

a customs declaration

Learner example:

The Spanish government has not been an exception and has tried to control pollution. Apart from taking part in world conferences and joining K[yo]to's declaration, it has also take[n] some measures. (Certificate in Advanced English; C1; Spanish)

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