I just ran across this book online -- Landmarkism Under Fire: a Study of Landmark Baptist Polity on Church Constitution by J. C. Settlemoir.
The book deals with what is termed (at least in this book) "Essential Mother-Daughter Authority" for the purpose of constituting a church. According to Settlemoir, "EMDA is a doctrine concerning church constitution" that "maintains authority must be given by a mother church in order to constitute a group into a new church. It teaches the authority of Christ was transferred to the church and consequently only a church can pass this authority on to another group." Or, as stated by a proponent of the idea, "Therefore I believe that all true churches were founded or established on the consent of a mother church." [7 Questions and Answers as to Church Authority, by Robert Ashcraft]
I believe this will prove fascinating reading to those interested in the polity of church constitution, whether or not one is a "Landmarker".