How can I occupy a level 2 plot?

This is part of the Reign of Chaos event. For the initial events your province will become full of plots of different levels. The level 1-5 plots will be towards to outer edges of the map. You will need to have occupied a level 1 plot first. You can only occupy plots that one of your own or an alliance members plots or honor structures are next to. As you occupy higher level plots you will need to harvest and process the resources from them.