For an open Troop, or for Troops in camp, I think the Scouts' Own should be open to all denominations, and carried on in such a manner as to offend none. There should not be any special form, but it should abound in the right spirit, and should be conducted not from any ecclesiastical point of view, but from that of the boy.
For open troop gatherings or camp settings, Scouts' Own should be inclusive of all denominations and presented in a way that is respectful to everyone. There shouldn't be any specific format, but it should embody the right spirit and be conducted from the perspective of the young person rather than an ecclesiastical standpoint.