There is a sort of fair use policy involved. (4thletter.net)
It includes the general organization and use of the site, National Standards for geography and social studies, information on displaying and printing images and text at the site, how to read historical maps and general resources on cartography as well as fair use policies. (educationworld.com)
T - Mobile has stated in a forum post that from February the 1st the network will be aligning their «fair use policies», by cutting down data allowances to just 500 MB. (onemobilering.com)