Legal language ought to be precise.
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Both these values are satisfied by a law that fulfils two requirements: (1) the law must be adequately accessible to the public, and (2) the law must be formulated with sufficient precision to enable people to regulate their conduct by it, and to provide guidance to those who apply the law.
https://legaleseitup.wordpress.com/prescribed-by-law/
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Restrictions must be provided by law. Law must be formulated with sufficient precision.
http://freespeechunlimited.org/paises_incitement/bolivia/
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International human rights law and standards require that any restriction to the right to freedom of expression, including through art, must be provided by law and formulated with sufficient precision to avoid overly broad or arbitrary interpretation or application, and in a manner that is accessible to the public and that clearly outlines what conduct is or is not prohibited.
https://www.amnesty.org/en/latest/news/2018/08/cuba-new-admi...