The arbitrator's job

His name is Manuel Pimentel, and he’s a former Work Minister from the conservative Government of José María Aznar. He faces a tough decision. Aena (our employer) and Usca (our union) have been unable to reach an agreement after over a year of negotiation. It’s easy to say why. Basically there was some discrepancy between the different positions. The company wanted us to be slaves working h24 with resting rights cropped, and everything else subject to “the provider’s obligation to guarantee continuity of service”. This was interpreted as 100% capacity service, when everyone should know, by now, that there is a shortage of air traffic controllers in Spain.
What about the Union’s requests. If you consider that the agreements between British, French, Portuguese or German controllers were laid upon the table and Usca would accept signing any of them, it doesn’t seem like our position was too radical.
So, what’s going to happen? Will Mr Pimentel refer to before February 5th last, when the agreement between Usca and Aena was legitimate, or will he allow all the illegal Royal Decrees imposed since then to influence his final ruling?
I’m afraid the end result, whether the whole system is going to work, depends not only on this, but also upon whether Aena has enough capacity to implement the changes and comply with it’s part of the Mr Pimentel’s arbtrarion award. Personally, I feel they haven’t and things are going to be rough regardless of the arbitration outcome.