Article 30 (As amended by the Constitutional Law of October 17, 1927 And b the order 129 of march 18, 1943, And by the constitutional law of January 21, 1947, And by the constitutional law of September 21, 1990 ) The Deputies alone have competence to judge the validity of their mandate. No Deputy's mandate may be invalidated except by a majority of two thirds of the votes of the entire membership. This clause is automatically canceled as soon as the Constitutional Council is established and as soon as the laws relating to it are implemented. Article 31 (As amended by the Constitutional Law of October 17, 1927) Meetings of the Chamber outside those set for legal sessions shall be unlawful and ipso facto null and void. Article 32 (As amended by the Constitutional Law of October 17, 1927) The Chamber shall meet each year in two ordinary sessions. The first session shall open on the first Tuesday following March 15 and shall continue its meetings until the end of May. The second session shall begin on the first Tuesday following October15; its meetings shall be reserved to the discussion of, and voting on the budget before any other work. This session lasts until the end of the year. Article 33 (As amended by the Constitutional Law of October 17, 1927 An by the constitutional law of September 21, 1990) The ordinary sessions shall begin and end automatically on the dates fixed in Article 32. The President of the Republic in agreement with the Prime Minister may summon the Chamber to extraordinary sessions by a decree that specifies the dates of the opening and closing of the extraordinary sessions as well as the agenda. The President of the Republic shall be required to convene the Chamber if an absolute majority of the total membership so requests. Article 34 (As amended by the Constitutional Law of October 17, 1927) The Chamber shall not be validly constituted unless the majority of the total membership is present. Decisions shall be taken by a majority vote. Should the votes be equal, the question under consideration shall be rejected. Article 35 (As amended by the Constitutional Law of October 17, 1927) The meetings of the Chamber shall be public. However, at the request of the Government or of five Deputies, the Chamber may meet in secret sessions. It may then decide whether to resume the discussion of the same question in public.