PCN/ ACN Mikonos A320 Question

[eagle21]

Could anyone look at the following for me please. I have calculated that the ACN on an A320 (MTOW 77T A/C) exceeds the PCN at LGMK with weights above 66t and the 10% buffer above 74t. If this is the case where can I find information on any aproval by the Greek Aviation Authrorities for operations of this aircraft type at MTOW in Mykonos?

Thanks for your help.