HathiTrust訴訟判決、障害のある人がアクセスしやすい形式（全文利用等）での提供はフェアユースと認められるようです。

Narrow Fair Use Ruling Permits Limited Library Uses, Shoots Down Replacement Copying

(update：June 11, 2014)
We received yesterday’s Second Circuit decision in Authors Guild v. HathiTrust with mixed feelings. The decision was not a total victory for either side. While the Court, over our objections, allowed HathiTrust to maintain its database of digitized books in light of the present security protections, the Court was clear that any breach of that security leaves HathiTrust at risk of future litigation..
Source: The Authors Guild