When the ballot boxes have been opened, it is the responsibility of the polling commission:
1) to count the envelopes bearing the relevant polling commission seal found in the ballot boxes;
2) to regard the envelopes unsealed by the relevant polling commission invalid without opening them; to count the invalid envelopes, package them and make a note about it in the minutes of the preliminary counting of votes;
3) to open the counted valid envelopes, to remove the ballot papers and check if the envelope contains only one ballot paper;
4) to sort the ballot papers according to the numbers assigned to the lists of candidates, making a distinction between valid and invalid votes and counting the votes cast for each list of candidates.