250.142B Exception No. 2 It shall be permissible to ground meter enclosures by connection to the grounded circuit conductor on the load side of the service disconnect if
(a) No service ground-fault protection is installed, and
(b) All meter enclosures are located near the service disconnecting means, and
(c) The size of the grounded circuit conductor is not smaller than the size specified in Table 250.122 for equipment grounding conductors.
The word "near" is kind of open for interpitation... But you might notice that many neutral bars in meters are mounted directly to the can. Some places don't allow a GEC inside the can, and this is how it gets grounded. Many POCO's seem to have different rules about this, from what i can tell from other posts on the topic. If that exception is allowed where you are, there be no need to bring the GEC to the meter.
As for the question about 250.64C, it gets answered in E.
Where I am only RMC is allowed for service conductors, and would be bonded at both ends.