Article 2 of the IELB bylaws informs us that the national convention is the deliberative and legislative head of the church. Article 3 determines the participants of the conventions:

I)                   voting:

One (1) pastor and one (1) lay member from each parish. A parish is understood as that which is constituted by one or more congregations with (a) member pastor(s), spiritual and administrative jurisdiction. The president of the IELB has the right to a vote on the basis of his office.

II)                 advising:

a)      the national officers of the IELB;

b)      one (1) representative of each administrative council of the official schools;

c)       the director of each of the official schools or his representative;

d)      one (1) representative of each council or commission elected by the national convention or by the board of directors;

e)      one (1) representative of each auxiliary organization of the IELB;

f)        district lay leaders and district counselors not credentialed as voters by their congregations;

g)      other active or retired church workers.

Article 4 says that the national convention normally meets every four years at a time and place determined by the previous convention, or, failing that, as determined by the board of directors, with a minimum of 12 months preparation time; and it convenes in extraordinary cases when necessary.

Article 5 establishes the authority of the national convention:

I)                   promote the spiritual communion, integration and edification of the members of the church;

II)                 engage in doctrinal, theological and administrative studies;

III)              examine, propose and decide strategies, plans and programs of action of the IELB of both medium and long-term periods;

IV)               Determine positions and proclamations about practice within the church and about doctrine in general;

V)                  Elect the national officers and others as required by these bylaws;

VI)               Vote on motions brought forward according to due process;

VII)             Alter the statues of the IELB and these bylaws to update them according to the IELB plan of action;

VIII)          Receive and respond to the appeals of the members and entities connected with the IELB who are not satisfied with the decisions made by the commission of appeals;

IX)               Declare or break altar and pulpit fellowship or programs of mutual cooperation with ecclesiastical corporations;

X)                  Declare positions on whatever matters of interest to the IELB are not anticipated in this article.