Structure Commander / Donator Planet Housekeeping

The last post I saw on this @Booyaah was:

PVE and PvP - Restricted - No taxes till you have 100 structures on the planet! As soon as you reach over 100 structures your planet will be taxed - for everyone on that planet! As soon as you fall under 100 structures the taxes are removed again

Hence my desire to track the cores because as far as I know in Rex’s math Core = Structure.