Nope, they very explicitly apply to all mods:zerragonoss said:The new modding rules should only apply to mods that affect the online modes.
www.simcity.com/en_US/blog/article/modding-and-simcity
"By Mods we mean any modification or alterations to SimCity, including add-ons, new content, modified UI, or updates that use content from SimCity such as code, art, footage or other elements"
It doesn't matter what part of the game you mod, it's bound by their rules. On the plus side, I fail to see how that's in any way enforceable. Since it's offline, they have no possible way of knowing what anyone might have done to the game and there's nothing they can do about anyway. It could make distribution of mods more difficult though, since many sites will be reluctant to host anything that could get them sued by EA.