so basically if a fort was made in january and made non peaceful and then a peaceful town was for example made in march then expanded to be withing 8 chunks of the non peaceful town it should make 8.2 invalid or reversed onto the other town as that town moved next to a fort and knew it was a non peaceful town and encroached into the 8 chunk limit out of the town owners own decisions.

current rule:
"8.2Your town must be reasonable to siege
Non-peaceful towns must be separated from other towns by eight chunks. Town claims existing prior to January 2023 may remain 3 chunks away from other towns.
You may not partially or fully encase non-peaceful towns with friendly towns. Violation of this rule may result in surrounding towns being deleted without warning and without compensation.
Ideally, attackers should not have to cross claims land in order to reach a siege on your town.
An example of a peaceful and non-peaceful town violating this rule: a peaceful town partially surrounds the non-peaceful town to make it impossible to be attacked from the west.

This would be illegal even if the peaceful town was separated from the non-peaceful town by three or eight chunks. There is no 'loophole' in the rules here: the town is still encased.
If you are afraid of your town being sieged then you should consider setting your town to peaceful."