Materials to accompany an application for registration

Federal Law on Popular Referendum (March 14, 2014)

Article 14. Citizens who wish to file a request for popular referendum for the next immediate referendum day should submit a Notice of Intent to the Chairman of the Executive Board of the corresponding Chamber with the corresponding format defined by said Chamber for such purpose. […]

The law states that citizens should submit the request using "the corresponding format defined by said Chamber for such purpose". No provision exists about that format.