Venezuela uses a controversial electronic touch-screen system. The contraption does, at least, generate a paper trail. And that paper trail will be intensively audited on the night of the election. The Elections Authorities have published an elaborate handbook for poll workers, detailing the procedure.
Keep in mind that Venezuelan polling stations ("Centros de Votacion") often include more than one voting table. The plan is to hand-count the votes from the machines in 54% of the voting tables. At least one table will be audited in each polling station, with more tables audited in larger polling stations. And how will they select which tables within a polling station? Following this procedure, which I've translated from the the Table Worker's Manual produced by CNE:
Procedure for the Audit
1) The chairs of the various voting tables shall meet at the place where table No. 1 operated, in the presence of the witnesses and of international and Venezuelan observers, if any are present, and they will proceed to select by draw the voting tables where the audit of the automated voting system will take place.
2)They shall write in identical pieces of paper the numbers of the voting tables that were used in that polling station, in ordinal sequence starting with the number 1.
3) They shall place the pieces of paper inside an envelope and shake it.
4) They shall extract and announce the number of the voting tables to be audited, in accordance with this table:
The key thing to note here is that if the numbers in an envelope procedure is followed, any fraud committed will be very very evident.
The opposition's job now is to make sure these rules are followed. Rosales has been very clear about this. And really there's no excuse if they still don't have people for all the key places.
Alarmingly, though, an opposition NGO is warning that the opposition has few or no witnesses at 732 voting centers in heavily chavista areas where 437,460 people vote, and also has a watchlist of about "high risk" polling stations where 1,833,033 people vote.
We're talking places like the Colegio Jose De Jesus Arocha, on the Redoma De Petare, and the Grupo Escolar Rafael Napoleon Baute at the Calle Real Del Barrio Jose Felix Rivas - both in Petare, Caracas' biggest shantytown. In the Caracas area, there are many such polling stations in poorer areas like Catia, Santa Rosalia, El Valle, Antimano, 23 de Enero, Carallaca, Guarenas and Guatire. But they are all over the country.