Outlawry?
I believe the reference is to the National Council of Churches but my research is coming up dry on the 1925 date as to a specific occurrence that year. My apologies to all as my memory and assumption has achieved the usual results of most assumptions. JMO - since most “mainline” Protestant churches have signed on to the NCC pablum rather than the “Faith of our Fathers”, you can chart their significant loss of membership as they took on increasingly liberal/non-Biblical positions.