We believe that paying the price for power as stipulated in the contract is no longer possible for Rio as it battles a prolonged slump in the aluminium market.

FORBES: Rio Tinto's Aluminium Woes Continue

Richardson's order stipulated that power should be sold to utilities at a price he considered fair, after some utilities complained that wholesalers were charging unfairly high rates for their electricity.

CNN: Federal commission could act today on Western power crunch

Apple also stipulated that publishers couldn't let rival retailers sell the same book at a lower price.

WSJ: U.S. Warns Apple, Publishers on E-Book Pricing