Articles 46 to 51 define the presentation of ballot papers and the physical conduct of voting. They make no mention of the insertion of ballot papers in envelopes or the passage of voters through polling booths - the very existence of polling booths, screens or curtains is not even mentioned. Passage through a polling booth or a similar system is essential to guarantee the secrecy of the vote. The 2013, 2015 and 2021 decrees explicitly provided for passage through the polling booth but made no mention of envelopes. However, envelopes could be an additional guarantee of the secrecy of the vote. The Venice Commission recommends that provisions guaranteeing the secrecy of the vote be included in the decree itself.