The difficulty of mobilizing the intellectual resources of such an assembly is very great. (religion-online.org)
The Regional Assemblies (Preparations) Act 2003 made provisions for referendums to be held to create such assemblies, and to simplify the structure of local government where this is done. (en.wikipedia.org)
In March of 2014, the leaders of all the autocephalous (independent) Orthodox Churches met in Istanbul, the sacred see of the Ecumenical Patriarchate, which historically (since at least the fifth century) coordinates such assemblies, facilitating unity while serving as a center of appeal among these churches. (firstthings.com)