If I'm reading this correctly, the publisher Dargaud has asked sites that carry images from their books to sign a general charter agreeing to certain responsibilities for their use. Those seems to include:
1. Copyright mark of Dargaud must appear.
2. Name of the author must appear.
3. No more than 3-4 pages published.
4. Reference to Dargaud's official site.
5. Dargaud's legal claim to visual elements and writings is understood.
6. Use of elements on Internet without publisher's permission forbidden.
There are also a few more legalistic ones about remote loading I don't understand. It looks like a number of sites have signed up, although others have claimed they already reasonably follow established law in terms of journalistic use.