The request for a referendum must be submitted to the Federal Chancellery before expiry of the referendum period, either with the support of the number of cantons required by the Constitution or furnished with the required number of signatures and the certificates of eligibility to vote.
1 Inserted by No I of the Federal Act of 21 June 1996, in force since 1 April 1997 (AS 1997 753; BBl 1993 III 445).
