The term "normative" has special meaning. From Wikipedia: In law, as an academic discipline, the term "normative" is used to describe the way something ought to be done according to a value position. A normative document (such as an ISO Standard) has greater credibility, if not authority, than any other reference in a contract or law. It has been developed through an audited, collaborative consensus. It is created voluntarily to meet a demonstrated need. It is specific and expressed the same way in all instances. Since there is no normative definition of UTC, every instance in a contract, law, or similar vehicle should be accompanied by the definition intended. This is a major flaw of the US law of 2007 that mandated UTC as the civil time scale in the US. It did not say what UTC was, is, or will be, so it could be anything as long as DoC and USNO agree.
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