The code states that the main bonding jumper must be in the first panel or elsewhere on the line side of the service. Where does it say that there cannot be multiple main bonding jumpers for a single service with a single disconnect? For instance, in a residential situation what keeps me from running a grounding electrode conductor up into the meter socket, bonding it there, then runnning it into the main electrical panel where it is again bonded to the grounded conductor. This creates a parallel path between the two enclosures with the grounded and grounding conductors. Wisconsin doesn't allow the main bond to be in a residential meter and the electric utilities don't allow the grounding electrode conductor inside the meter at all (even if it is insulated). However, my question is, does the NEC itself allow this type of parallel path?