Election Obligations & Standards Database
"All signatures must be checked. In order to facilitate checking, lists of signatures should preferably contain the names of electors registered in the same municipality. "
CoE (Venice Commission): Code of Good Practice on Referendums
, para. III.4.f
Code of Good Practice on Referendums
Limits on individuals wishing to run for office may only be based on objective and reasonable criteria, including support from a minimum number of citizens.