Variable tech level
The tech level within the Terra Prime Concord is PL7. The TPC is in its gravitic age. But the campaign is not locked into a PL7 format. Some groups will be higher, and many will be lower. Some will even be amalgamations; it is highly conceivable to me that some breakthroughs could be limited to a few or even one field. One colony might not have PL6 gear because they have put all their resources into PL7 gravitic drives. Another might have high resources with low tech, like PL5, but they trade resources with a very advanced society that needs their less advanced neighbor’s minerals. This would mean the PL5 planet could have a smattering of PL7-9 tech. So you might be able to start with higher tech if your background allows for it, or you may come across higher tech during your travels. Regardless, it is safe to assume that you are in PL7 for starting gear unless you have checked with me.