Issues in relation to which referendums are mandatory at the national level

Nigeria
Constitution of the Federal Republic of Nigeria 1999
Article 8 (Mandatory Referendum)
(1) An Act of the National Assembly for the purpose of creating a new State shall only be passed if-
(b) a proposal for the creation of the State is thereafter approved in a referendum by at least two-thirds majority of the people of the area where the demand for creation of the State originated;
(c) the result of the referendum is then approved by a simple majority of all the States of the Federation supported by a simple majority of members of the Houses of Assembly;
Article 8.
(3) A bill for a Law of a House ofAssembly for the purpose of creating a new local government area shall only be passed if -
(b) a proposal for the creation of the local government area is thereafter approved in a referendum by at least two-thirds majority of the people of the local government area where the demand for the proposed local government area originated;
(c) the result of the referendum is then approved by a simple majority of the members in each local government council in a majority of all the local government councils in the State; and […]