§ 1. In order to build a political alliance, a candidates’ list may deliver a declaration of correspondence.

§ 2. The declaration of correspondence may only be on one or several list(s) presented in other electoral constituencies, that are taken into consideration for the allocation of seats to the coopted senators of the same linguistic group in the Senate, according to article 217quater or article 217quinquies.

§ 3. The declaration is signed by at least two of the three first incumbent candidates of the concerned lists.

The declaration of correspondence is handed over to the clerk of the Senate no later than on the 18th day before the vote before 4pm.

§ 4. The declaration mentioned in § 1 is invalid if:

1° it communicates the lists of the same electoral constituency;
2° it is supported by the lists of the electoral constituencies for the allocation of the seats mentioned in article 217quater as well as in article 217quinquies;
3° it is not signed according § 3, first sentence.

§ 5. If one of the lists figuring in the declaration is rejected, the declaration remains valid for the other lists of groups.

§ 6. On the 17th day before the Election Day, the clerk of the Senate verifies the validity of the declarations and establishes a table of the corresponding lists.

In this table every group of the corresponding lists is denominated with a letter A, B, C, etc.