For one, the agreement between the Church of Greece and the EP in 1928 on the "New Lands."
Also the OCA's autocephaly is not even truly regarded as autocephaly like unto that of other churches by the Moscow Patriarchate because the MP still has parishes in America. Unless it is an autocephaly which does away with canonical territory--something becoming more and more fashionable. The MP retaining parishes is neither unique nor unprecedented.
Based on what?
The "New Lands" agreement between the Ecumenical Patriarchate and the Church of Greece is not analogous to the Russian Orthodox Church's maintenance of their "Patriarchal Representation" in the U.S. and Canada, but nice try.
The Metropolis's of the "New Lands" are integrated into the administration of the Church of Greece, their Metropolitan-Bishops being members of the Holy Synod of the Church of Greece, while their elections are ratified (approved) by the Ecumenical Patriarchate---though if I'm not mistaken, they commemorate the Ecumenical Patriarch liturgically.
The Russian Orthodox Church maintains 32 parishes in the U.S. and 25 parishes in Canada, a total of 57 parishes which have no administrative ties whatsoever with the Orthodox Church in America, thereby maintaining essentially parallel dioceses on the territory of "The Autocephalous Orthodox Church in America." Within the "Patriarchal Representation," the Patriarch of Moscow is commemorated, and it is administered in the U.S. by his auxiliary archbishop from his New York Cathedral, the cathedral the Russian Orthodox Greek Catholic Metropolia lost to the "Living Church" 9 decades ago.