An organisation borders with a diverse environment of various other organisations, individuals, entities and spheres.
The border of an organisation is de facto multiform, because the other side varies.
Although the organisation might want to build uniformity, for al kinds of reasons. The experience of the border will nevertheless vary, because of the variations on the outside.
Although the defined brand-image (a form of border) might be rolled-out in a global uniform way, the actual experience will differ between clients, geography, the services and products exchanged. There may be a kind of unity in atmosphere, but assuming a standard interface (and one image) is foolish and certainly myopic.
So in reality there is no blank sheet to design the organisation on.