Election Obligations & Standards Database
"The time-limit for collecting signatures (particularly the day on which the time-limit starts to run and the last day of the time-limit) must be clearly specified, as well as the number of signatures to be collected. "
CoE (Venice Commission): Code of Good Practice on Referendums
, para. III.4.b
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.