It says the following:
"Core Five
- Official factions that have proven responsible and productive role playing members of the community for at least three months as Core 4, may request to have their bases upgraded to Core 5.
- Once approved, base owner will receive, from the admins, another set of 'blueprints' to upgrade their base. Again, these blueprints are non transferable and any abuse will result in loss of base.
- With the upgrade to Core 5, wear & tear damage on the base will be disabled, and owners can further request the removal of FOW consumptions through a special roleplay request.
- Only one Core 5 base per official faction is permitted."
When I try and upgrade from core 4 it says the upgrade is unavailable?