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<p>[QUOTE=&quot;Bronwen, post: 498273, member: 5833&quot;]I&#039;m going strictly from very shaky memory here, so sort me out.&nbsp; Know I looked into this once, &amp; what I think I recall was some kind of industry agreement in the 1970s for standardizing marks, that sort of thing, but voluntary, although it would seem a disadvantage not to comply.[/QUOTE]</p><p><br /></p>

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