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I don't follow. Are you suggesting the link you posted contradicts something I said?

If you want a source that the 1930 law used midori, see here, under 発祥期:

https://ja.m.wikipedia.org/wiki/%E6%97%A5%E6%9C%AC%E3%81%AE%...

Are you referring to reference number 184? I'm looking for a primary source for your statement that midori was the colour standardized in law since the 1930s, because the section I linked about colours explicitly calls out ao and notes the difference in different jurisdictions.

> your statement that midori was the colour standardized in law since the 1930s

In 1930, not since the 1930s. The 1930 law used midori, but it was changed to ao in 1947 after that became the more popular usage. The page you linked was about the current law.

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