1. The periods and competent bodies for the registration of candidacies in the election year are the following:

a) In the election year in which the President of the Federal Executive Branch and the two Chambers of the Congress of the Union are renewed, all the candidates will be registered between February 15 and 22 by the following bodies:

1. The candidates for representatives by plurality, by the district councils;


2. The candidates for representatives elected by the principle of proportional representation, by the General Council;


3. The candidates for senators elected by the principle of plurality, by the corresponding local councils;


4. The candidates for senators elected by the principle of proportional representation, by the General Council, and


5. The candidates for President of the United Mexican States, by the General Council. This body could additional register the candidates referred to in fractions I and III.

b) During the election year in which only the House of Representatives is renewed, the candidates by both principles will be registered between March 22 and 29, by the bodies mentioned in the factions I and II of the previous subparagraph.

2. The General Council could make changes to the periods established in this article to guarantee that the registration periods and the length of the electoral campaigns agree with the provisions of article 251 of this Law.

3. The Institute will widely circulate the opening of the candidate registration and the periods referred to in this Chapter.

4. In the event that the political parties decide to register, in a supplementary manner, some or all of the candidates for Representatives or Senators by the principle of plurality before the General Council of the Institute, they should do so no later than three days before the periods referred to in this article expire.