Yeah, you're pretty much right on. They can publish their calendar without having to license anything at all or get any permission from Ford, so long as they don't market it with Ford's corporate logo and the Mustang logo. An analogy that occurs to me is third-party iPod or Nintendo (etc.) stuff: they can include pictures of the Wii, or the iPod, on their packaging, and they can say "Compatible with Nintendo Wii" or "Works with the Apple iPod," they just can't use the Apple logo or the Nintendo font and red oval. So long as it's clear that it isn't Ford creating or selling this calendar, the group has very broad rights.