Other Pages Of A Site That Are Required By Law?

We all know about having a link to the 2257 information on our sites but what other pages are required by law on the websites we build?

I know a privacy policy is a huge one, i beleive CA and several other states passed laws a couple of years ago stating that any website that collected data about its users must have a privacy policy on the site explaining how that data will be used.

Are there any other types of pages that are required by law other than a privacy policy and a 2257 statement on our websites you can think of?

Also, what about pages that are usefull to have but arent legally required? I know on most of my paysites ill add a link to a 'support' page where surfers/members can find solutions to most browser/media related problems on my sites.

Regards,

Lee