Would An Act of Parliament Be Required to Make Appointment of the ABC a more Communionwide Process

Kevin Montgomery asks this question in Comments to the Episcopal Cafe Lead this morning.

The answer is not necessarily so. At present, the Archbishop of Canterbury is appointed by the Crown upon recommendation of a commission drawn from appropriate members of the Church of England, a procedure completely within the bounds of the Act of Restraint of Annates (1534) and the legislation it replaced such as King John's, "That Elections in the Whole of England Be Free." As long as none of the members are not in Communion with Rome, I know of no statute that would forbid foreigners from sitting on such a commission. To ensure this procedure had legal force (that a certain number of foreigners of a certain type had to be appointed), I believe a Measure of Synod would be required, which through joint resolution of Parliament confirming the same has equivalent force to an Act. As far as I can tell, removing the appointment of the Archbishop of Canterbury from the Crown to another organ also could be enacted by Measure.