Issues of sub-national referendums regulated at the national level

Senegal
Answer
None
Source
Constitution (7/01/2001)http://democratie.francophonie.org/IMG/pdf/Senegal.pdf
Electoral Code (27/12/2011)http://ddata.over-blog.com/1/35/48/78/S-n-gal/Code-Electoral-2012-SENEGAL.pdf
Comment
No provision was found in this regard