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

1.
法定文書, 委任立法
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.
政府は既存の環境規制を改正するために新しい法定文書を発行した。
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Many detailed laws are made through statutory instruments rather than full Acts of Parliament.
多くの詳細な法律は、完全な議会法ではなく、法定文書を通じて作成されます。