Issues of sub-national referendums regulated at the national level

Uruguay

Answer

Any decree issued by the Department Boards

Source

Constitution of Uruguay (Constitución de la RepúblicaOriental del Uruguay)

http://www.refworld.org/docid/3ae6b5600.html

Article 304

The law, by an absolute majority of votes ofthe full membership of each Chamber, may introduce the referendum as a recourseagainst decrees of the Departmental Boards.

Likewise, by an absolute majority of thevotes of the full membership of each Chamber, the law may introduce andregulate the right of popular initiative in affairs of the DepartmentalGovernment.