In 1605, King James attempted to unite the Presbyterian Church of Scotland with the Episcopal Church of England. In order to prevent the General Assembly of the Presbyterian Church blocking this, he placed it under an interdict to prevent it from meeting. The Parish of Tain was one of the Presbyteries which opposed the proposed union, and in defiance of James' interdict, they sent John Munro as representative to an Assembly at Aberdeen on 2 July 1605. On that occasion he was nominated as Moderator.