Users will submit content to my website. I want them to license that content under CC BY 4.0 when they do, otherwise they should not submit it. Thus, all user-submitted content will be released under this license.
I'm guessing this means they need to read and agree to a Terms Of Service. Is there a standard or common way to present a ToS (or other mechanism) that is specifically appealing to the libre/sharing/commons community?
(This question isn't limited to CC BY 4.0, imagine it's any Free Cultural Work license.)