statutory instrument
US /ˈstætʃ.ə.tɔːr.i ˈɪn.strə.mənt/
UK /ˈstætʃ.ə.tɔːr.i ˈɪn.strə.mənt/

1.
instrumento estatutario, norma delegada
a form of delegated legislation in the United Kingdom, by which powers to make detailed regulations under an Act of Parliament are exercised by the executive
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The government issued a new statutory instrument to amend the existing environmental regulations.
El gobierno emitió un nuevo instrumento estatutario para modificar las regulaciones ambientales existentes.
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Many detailed laws are made through statutory instruments rather than full Acts of Parliament.
Muchas leyes detalladas se elaboran a través de instrumentos estatutarios en lugar de leyes completas del Parlamento.