Article 21 says elections shall be held by secret this
(1) Everyone has the right to take part in the government of 
his country, ... this will shall be expressed in periodic and genuine elections 
which shall be by universal and equal suffrage and shall be held by secret vote 
or by... [DOC] [TLE] Free, Fair, & Regular Elections: Essential Principles | Democracy Web [PAR] ... be by universal and equal suffrage and shall be held by secret vote or by 
equivalent free voting procedures."