| Parliament name (generic / translated) |
Assembleia Nacional / National Assembly |
| Structure of parliament |
Unicameral |
| LEGAL FRAMEWORK |
| Electoral Law |
7 May 1975 |
| Mode of designation |
directly elected 55 |
| Constituencies |
7 multi-member constituencies. |
| Voting system |
Proportional:
Proportional representation system with closed party lists.
Vacancies arising between general elections are filled by the "next-in-line" candidates of the same party list.
Voting is not compulsory. |
| Voter requirements |
- age: 18 years
- Sao Tome citizenship
- disqualifications: mental deficiency, allegiance to foreign State, criminal conviction |
| CANDIDATES |
| Eligibility |
- qualified electors
- age: 18 years
- Sao Tome citizenship
- ineligibilities: convicted persons with a suspended sentence, those sentenced to imprisonment and still serving, those legally deprived of their political rights |
| Incompatibilities |
- members of the National Electoral Commission
- members of the Government and their office directors
- ambassadors, directors general |
| Candidacy requirements |
- nomination by a party and inclusion on its list or by group of 250 qualified electors |