Abrogated by independence. The entity that granted it no longer existed as the legal authority under which it was granted.
The land always belongs to the people.
In perpetuity in a court of law means exactly what it means.
Do the Cubans have a right to fire on the United States installation at Guantanamo bay because the lease for the facility was signed by a previous Government.
It doesn’t work that way and stupid people who try it invariably get killed.
fail to pay your property taxes and see how long the land belongs to your.