Facebook revised their Facebook Pages terms and conditions on December 17 2012. To read the full page of terms please click here.
The most significant changes have to do with Facebook cover images.
Section 3 Subsection B
CoverAll covers are public. This means that anyone who visits your Page will be able to see your cover. Covers can’t be deceptive, misleading, or infringe on anyone else’s copyright. You may not encourage people to upload your cover to their personal timelines.Covers may not include:i. images with more than 20% text;ii. price or purchase information, such as “40% off” or “Download it on socialmusic.com”;iii. contact information such as a website address, email, mailing address, or information that should go in your Page’s “About” section;iv. references to Facebook features or actions, such as “Like” or “Share” or an arrow pointing from the cover photo to any of these features; orv. calls to action, such as “Get it now” or “Tell your friends.”