Premises qualify as B where they comprise a laboratory or co-located laboratories related by an appropriate (written) arrangement to a GX or GY laboratory, are under the direction and control of the same designated person as that related laboratory, and render one or more groups of pathology testing under the supervision of a pathologist, whether or not the designated person, from a laboratory within the pathology network. A B laboratory has no resident pathologist requirement of its own; the network supplies the supervision, which is why the National Pathology Standards attach virtual supervision, annual visit and onsite manager development expectations to B laboratories.
The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.