with a resource partition u201c rp u201d identifier list for example the ne identifier list may contain the network service category u201c nsc u201d tags ne 1 ne 2 ne n whereas the rp identifier list may contain the nsc tags rp 1 rp 2 rp n this may be summarized as follows ne nsc list ne 1 ne 2 ne n 1 rp nsc list rp 1 rp 2 rp n 2 the foregoing nsc tags are as defined in the policy routing specification referenced above where the restricted transit flag 52 as aforesaid indicates that the restricted transit status is enabled the exception list 54 originally reflected in the form of the foregoing coupled lists 1 and 2 can be further combined to form a single logically and 39 d exception element as follows as known to those skilled in this art a call or connection policy that is signaled according to the policy routing specification may have multiple policy elements associated therewith these policy elements are groupings of policy routing tags as explained in greater detail below where a policy based call requires by way of any one of its signaled policy elements any combination or subset of the nsc tags found in exception element 3 above then the call or connection.