Quorum requirements for a referendum to be valid

Mali
Answer
Not specified by legislation
Source
The Constitution of the Republic of Mali (1991) http://?confinder.?richmond.?edu/?admin/?docs/?Mali.?pdf
Electoral law (2011)
http://?www.?matcl.?gov.?ml/?index.?php?option=com_?rubberdoc&view=category&id=46&Itemid=91