Answer:
Article 1, Section 10 says:
- Only congress can conduct diplomacy relationships with foreign countries and the only congress can print currency notes, no states.
- According to Article 1, Section 10 states are not allowed to act as an independent country.
- According to Article 1, Section 10 states are not allowed to charge a tariff on the imports from other states.
- According to Article 1, Section 10 states are not allowed to keep his own army or rage war.