As you say, it's hyphenated as an adjective. When not an adjective, it should not be.<p>So: "Bring our records up to date."<p>But: "Please examine our up-to-date records."<p>As for a source, I would cite the general rule of compound adjectives, which is to hyphenate before a noun, except in such cases where the adjective would become a single word (which obviously doesn't apply here).<p>You aren't using "up to date" in that way, so the only other reason you would hyphenate it would be if the phrase itself appeared hyphenated in your publication's dictionary or stylebook. Assuming it doesn't (and I should hope it doesn't), use no hyphens.
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