Hi Bert I am not sure what you mean here.
the ground conductor from the meter pan, to the distribution panel
Why would we run a ground conductor from the meter to the panel?
The section you are probably asking about is 250.64(C)
(C) Continuous. The grounding electrode conductor shall be installed in one continuous length without a splice or joint, unless spliced only by irreversible compression-type connectors listed for the purpose or by the exothermic welding process.
Exception: Sections of busbars shall be permitted to be connected together to form a grounding electrode conductor.
Here is a picture that shows what conductor is the Grounding Electrode Conductor and what conductors are bonding jumpers.