I also don't know about the CEC, but I might have a couple of issues about this.
1) Is the MCC the service equipment? If so, is it listed as such? Also, in the NEC, the nuetral would have to be sized as a GEC, as per 250.24(B).
2) Is the nuetral sized large enough to clear a phase to nuetral fault? There is a change in the 2005 NEC that states that nuetral conductors must be sized not only to carry the unbalanced load, but also large enough to qualify as an EGC, in case there is a line to nuetral fault.
