http://www.defence-point.gr/news/?p=76032
It basically states that Greece with two choices can basically Knock out the Above treaty.
1)IT will only accept a temporary security mechanism with the UNSC,EU,Nato that will replace Zurich for a temporary period.
2)The second option is more extreme. Greece will refuse to consent to a solution if the position adopted by Downer, and namely that of the Turks, to maintain the well-known zurich framework guarantees.And to basically leave the treaty which then will make it politically and legally extremley weak.