We received a question from a conference organizer whether we would also accept open-access licenses other than CC-BY 4.0 for publishing proceedings, specifically the (British) Open Government License OGL 3.0. This question was the first time that I heard about this license. After doing a bit of research, it turns out that it shares similarities to CC-BY 4.0.
However, since it has a different wording, it is formally not equivalent to CC-BY 4.0. It is also not widely used for open-access publishing, in particular it will probably not be used outside of the UK. In contrast, CC-BY 4.0 is the de-facto worldwide standard for open-access publishing.
At CEUR-WS, we need to be economic with our resources. We provide the service in our free time and we are not lawyers. We thus uniformly require CC-BY 4.0 for papers. This implies that there is a single set of legal clauses applicable to such papers.
What do you think? Shall we be more liberal with open-access licenses?
Manfred
PS 2021-03-01: We amended our rules on CC-BY at http://ceur-ws.org/HOWTOSUBMIT.html#FAQ-CCBY. CC-BY 4.0 remains mandatory, but the copyright part of the license clause can cater for Crown copyright (certain authors employed the UK gorvernment) and “No copyright” (certain US government authors).