Licensing contributions for structured data are currently not listed on Commons.
All structured data from the file and property namespaces are available under the Creative Commons CC0 License. We need a message that states this clearly to users before they publish contributions. Commons will use the same text that Wikidata uses because it has already been reviewed and approved by the legal department, and it's useful to have this kind of language be consistent across projects.
Users should see this message whenever the Edit button has been selected for any structured data contribution, and not be shown again once the licensing terms have been accepted.
The above message will be shown on edit unless the user permanently dismiss it by accepting those terms.
### Screenshot for reference