Issues of sub-national referendums regulated at the national level

Micronesia, Federated States of
Constitution 1978 (amended in 1990)
ARTICLE I. TERRITORY OF MICRONESIA
SECTION 3. Territory may be added to the Federated States of Micronesia upon approval of Congress, and by vote of the inhabitants of the area, if any, and by vote of the people of the Federated States of Micronesia. If the territory is to become part of an existing state, approval of the state legislature is required.