(1) Senators and Deputies are elected by slate voting, according to the principle of proportional representation.
(2) The representation rate for the election of the Chamber of Deputies is one Deputy for 73,000 inhabitants.

(3) The representation rate for the election of the Senate is one Senator for 168,000 inhabitants.

(4) The number of inhabitants taken into consideration corresponds to the population by domicile, as communicated by the National Institute of Statistics on 1 January of the year preceding the year when elections are being held.

(5) The number of mandates for the Senate, respectively for the Chamber of Deputies, shall be determined by dividing the number of inhabitants in each electoral constituency by the representation rates referred to in paragraphs (2) to (4), to which a mandate of Senator, respectively of Deputy, is added, for what exceeds half of the representation rate, provided that the number of mandates of Senators in an electoral constituency is not below 2 and those of Deputies, below 4.

(6) The number of mandates for the Senate, respectively for the Chamber of Deputies, for each individual constituency, is listed in Appendix 1.

(7) In the case of early parliamentary elections, the data used for the last parliamentary elections shall be taken into consideration.