There were a number of public inputs on this subject, and they all pretty much said two things. One, the EGC is much more important in terms of electrical safety as it is the fault clearing path and there is no restriction on splicing EGCs. Two, there was never any technical substantiation for the unspliced GEC. All of the PIs, were rejected for lack of technical substantiation, yet the panel issued a First revision with a panel statement that said:
" The requirement is revised to allow the splicing of grounding electrode conductors with listed grounding and bonding equipment to be used where the splice is made at an accessible location. Splicing by exothermic welding process and irreversible compression-type connectors is still permitted for accessible or non-accessible locations."