The answer is: 30°N latitude and 31°E longitude
(1) Claimed that individual states have the right to interpret federal laws.
Are there any choices to choose from
Answer: In a group of city-states, each city-state is independent and rules by its own king. No central power controlled all of the city-states. In an empire, consisting of a nation and the city-states and nations it has conquered, one ruler is in control.
Explanation: One has a king in where the other has just a ruler