Article R741-14 of the French Commercial code
The election of members of the National Council shall be by first-past-the-post ballot. Voting shall be by postal ballot. Ballots must reach the Chairman of the National Council within ten days of the date on which the ballot opens; at the end of this period, the ballot is closed. Each ballot paper shall be sent in a double envelope; the inner envelope, which contains the ballot paper, must be closed…