Martin Burnicki said:
Hm, I've just had a look at the current file once more: https://hpiers.obspm.fr/iers/bul/bulc/ntp/leap-seconds.list
I don't see any copyright statement at all in it, nor in the directory containing the file.
Irrelevant. Copyright exists and can't be made not to exist. (You're in Germany, right? You're subject to the Copyright Directive and the Berne Convention, same as I am.)
Would we require a statement telling explicitly that permission to copy the file is granted?
Yes.
I'm not sure how the staff of IERS feel about this, but this sounds like the kind of thing that might perhaps be solved by a simple request.
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