I read a bit of it. PCMR is suing Talisker. Talisker is saying that the extension through 2041 is invalid because PCMR did not properly notify Talisker by March 1, 2011 of their intent to extend(LOL), and PCMR is saying that they have been in contact for the past several years and indeed state their intentions of continued operations.
PCMR is essentially suing to keep Talisker to their end of the deal which would be continued operation as agreed upon by both parties until 2041. If Talisker wins they will effectively shut down PCMR. Talisker seems to be trying to back out to get more money, or as a ploy to try and buy out PCMR.