that would probably vary alot from country to country. i can just talk about switzerland, but such things would probably never be claimable in front of a judge, so its not really worth anything. AND i dont think that would be a good thing. you create the typeface, the designers have to live with it, not you.

for example, the headline font of a well known car manufacturer (the name has five letters, starts with M, ends with da..) is base12, but they useit 160% extended (!) - what ugly thing, but hey, its in the brandbook, and if you're just an intern like i am, you wont ask mazda to change its global brandbook just because you think (and are right) that this is pure bullshit. but with your idea, i'd have broken the eula! not mazda, but i.

EULAs can contain anything they want. However, stuff like that could probably not hold up in court. I'd guess.

As Tiffany says, a licence agreement may contain any provision, so if the licensor says "you can't use this above 14 pt size" and the licensee does, that would be legal grounds for the licensor to cancel the contract.

But really, there are practical ways to channel the aesthetic usage of fonts, such as:

1. make the type "small on the body" if you want to encourage a spacious look
2. fit it very tightly (i.e. narrow sidebearings) if you want it to be used for display
3. price it high to avoid the riff-raff getting their hands on it
4. similarly, don't sell through mass distributors
5. provide condensed, regular and extended versions to reduce incidence of horizontal scaling

As Tiffany says, a licence agreement may contain any provision. Furthermore, as Tiffany also says, the courts have (to put it mildly) a say in what is legally binding. Just because something is included in a written contract doesn't make it legally binding. As mentioned by Kesh, the legal rules vary from country to country. I'd suggest that you carefully consider the ethical ramifications of a provision before you add it to a (standard) contract.

Nick is right, if you want to control or influence the way your type is used you need to have a relationship with the user. Trying to legislate good use via the EULA isn't going to work. Providing a manual containing best practices, and providing templates is likely a better approach, but still you can't teach everyone to be a typographer.

> Providing a manual containing best practices, (...), but still you can’t teach everyone to be a typographer.

JFP did that for Parisine Plus and I thought it was a very good idea, well executed as well -- to the point and not too specialistic.