File talk:Plain Yellow Banner.svg

So, is this file public domain or not? It bears both a CC license notice and a public domain notice for expired copyright, implying that the original author put it under CC and then died, at least 70 years ago, which is impossible given that CC licenses have not existed that long. 2607:FEA8:12A0:194:0:0:0:2 22:53, 11 May 2018 (UTC)