§1. Each conference of bishops is to elect a president for itself, is to determine who is to perform the function of pro-president when the president is legitimately impeded, and is to designate a general secretary, according to the norm of the statutes.
§2. The president of a conference, and, when he is legitimately impeded, the pro-president, presides not only over the general meetings of the conference of bishops but also over the permanent council.
Source: Code of Canon Law (Vatican.va)