几十个竞争党派将参与选举，其中多数因2005年选举法规定至少要4%的全国选票才能进入众议院（下院）及8%的地区选票才能进入参议院而无缘赢得议会席位。
The ballot will include dozens of competing parties, most of which will not win parliamentary seats, owing to a 2005 electoral law requiring at least 4% of the national vote to enter the Chamber of Deputies (the lower house) and 8% on a regional basis to enter the Senate.