Canon 143

1. To the patriarchal assembly are to be convoked: (1) eparchial bishops and other local hierarchs; (2) titular bishops;

(3) presidents of monastic confederations, superiors general of

institutes of consecrated life and superiors of monasteries sui

iuris; (4) rectors of Catholic universities and of ecclesiastical universities as well as deans of faculties of theology and

Canon law, which are located inside the territorial boundaries of

the Church in which the assembly is held; (5) rectors of major

seminaries; (6) from each eparchy at least one presbyter enrolled in the same eparchy, especially a pastor, one from among

the religious or members of societies of common life according to

the manner of religious, as well as two lay persons, unless the

statutes determine a greater number, all of whom are designated

in a manner determined by the eparchial bishop and indeed, if it

is a case of a member of a religious institute or a member of a

society of the common life according to the manner of religious,

with the consent of the competent superior. 2. All who are to

be convoked to the patriarchal assembly must attend it unless

they are detained by a just impediment, of which they are obliged

to inform the patriarch; however, eparchial bishops can send a

proxy. 3. Persons of another Church sui iuris can be invited

to the patriarchal assembly and can take part in it according to

the norm of the statutes. 4. To the patriarchal assembly can

also be invited some observers from other Churches or non-Catholic ecclesial communities.