Sorry for my Ambiguous response regarding my reason as to Why Cyprus can not join any other pact or alliance without the participation of Turkey, thus showing why it would not be practical for Cyprus to form a federal agreement without the idea of "Two Founding States" at the very least in order to protect TC sensitivities.
Cyprus Treaty of Guarantee
Nicosia, 16 August 1960
The Republic of Cyprus on one part, and Greece, Turkey, and the United Kingdom of Great Britain and Northern Ireland of the other part.
I. Considering that the recognition and the maintenance of the independence, territorial integrity, and security of the Republic of Cyprus, as established and regulated by the Basic Articles of its Constitution, are in their common interest,
II. Desiring to co-operate to ensure respect for the state of affairs created by that Constitution, Have agreed as follows:
Article I
The Republic of Cyprus undertakes to ensure the maintenance of its independence, territorial integrity, and security, as well as respect for its Constitution.
It undertakes not to participate, in whole or in part, in any political or economic union with any State whatsoever. It accordingly declares prohibited any activity likely to promote, directly or indirectly, either union with any other State or partition of the Island.
So, and according to how I see it, Cyprus' EU entry before an agreed settlement was a mistake - Cyprus and Turkey should have joined the EU together! Otherwise Cyprus legally shouldn't have been allowed.
And, before GR lashes out again, I BELIEVE that Turkey should not sign a Federal agreement without to Founding States for Cyprus unless it is a Full member of the EU - It would be a big mistake for Turkey considering the many failed promises and the serious lack of Guarantee that Turkey will be allowed into the EU.
The original Cyprus republic was seen as a synergy of alliance between Turkey, Greece and Britain. But now it's obviously become an element of Partition!