What land are you on?
All the land taken in history is either by buying the land, through force or political systems.
Wars are fought over land, I find it hard to believe you have acquired sovereign territory.
If you do not have sovereign territory then your law is ultimately dictated by the people that do have authority over the land.
The only way you have acquired sovereign territory for free with no force is probably the land being questionable, such as a offshore platform or a small island off the coast of the north pole....
EDIT: Sorry if I sound negative its just an extraordinary claim that you have created essentially a new country.