doesn't hold true, since then the asset is effectively unusable.
I'm sorry, but I'm at a loss here trying to figure out what you mean.
I think the discussion about hosted projects in particular was just to examine a specific case where HLP might actually have some authority to set a default license.
HLP has no such authority because these assets are not usually physically hosted in HLP. What HLP does is provide a place to have a website and discussion forums. HLP doesn't even have its own SVN or equivalent. When it comes to the "Hosting policy", I'm not sure whether it is as binding as proper terms of service would be. Mostly it's probably closer to a gentleman's agreement than something people will have to agree upon in order to get hosting in HLP. And again, the problem is that no assets are actually hosted in HLP. Do you really believe HLP should have control over licensing of assets that are hosted in mediafire or who knows where? Legally, that'd be up to the party who provides the hosting.
At the very least we'll need to get people into the habit of asking what licence things are under.
That falls under encouragement from the community at large, you cannot enforce it as an authority. Not without proper TOS.
Let me give you an example. User X releases a mod on Mediafire. I download it. A year later I want to use it in a campaign. Mediafire has already deleted the download and there is no readme. In these situations we get some users who use the mod, some who use it but don't feel comfortable altering it, and some who won't touch it at all in case User X returns to scream like a banshee at them.
Even if people adopt a license now, it does not mean that any previously released assets are suddenly under that license. That would require original author or team explicitly announcing these assets are from now on under license X. If they do not, no license can be applied to previously released assets.
What to do with old assets?
- By default they can be used as released. For any other use of assets, permission should be asked from author.
- Authors are encouraged to publicly announce a license their assets are under and preferably add a notice to project's website of such, if website exists and any existing release announcements.
What to do with to-be-released assets?
- Authors are encouraged to select a fitting license and have that information provided in read-me, website and release announcements.
- If no license is selected, same old permission must be requested from author rule should apply.
And why? Because not a single one of us has any authority whatsoever to decide what license someone else's work is under, regardless of whether we can reach that person or not. Only they themselves can make that decision. A good example of this is the music from Asprin. Nobody else but Asprin can give a permission to release them to public or to give them a license. Only exception to this would be if TAP had explicitly stated rules for asset release and public use during time of development when Asprin was present and had agreed to those rules.