Note that some legislature will still be imperial - anything to do with new speed limits, taxes on pints, and in regards to sq ft.
To be honest, apart from the the budget, I can't remember the last time meaures were quoted in the two houses. Probably because measurement words rarely enter into everyday life situations.
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That is a fair summary of the process for the UK. However, the drafters of
legislation in the UK have been using metric units exclusively for some time
(decades I think). New UK laws/regulations are now metric only in the text.
The same applies to revisions of old laws. In fact, some revisions are
merely to metricate the text.
Where old laws have yet to be converted explicitly, an all-encompassing metrication regulation (The Units of Measurement Regulations) must be applied. This regulation defines the default conversion values that will be used by the court.
This permits the judicial system to be entirely metric in operation. It would be interesting to read documents describing how this strategy came about.
http://www.hmso.gov.uk/si/si1995/Uksi_19951804_en_3.htm#exnote "Where, before those dates, use is made in legislation, or in any deed or document (for example), of an imperial unit in the circumstances specified in the Directives and legal effect is to be given to that use after those dates, these Regulations provide for its conversion into the metric equivalent."
