Local Government Code of 1991
Section 492. Representation, Chapters, National Liga. - Every barangay shall be represented in said liga by the punong barangay, or in his absence or incapacity, by a sanggunian member duly elected for the purpose among its members, who shall attend all meetings or deliberations called by the different chapters of the liga.
The liga shall have chapters at the municipal, city, provincial and metropolitan political subdivision levels.
The municipal and city chapters of the liga shall be composed of the barangay representatives of municipal and city barangays respectively. The duly elected presidents of component municipal and city chapters shall constitute the provincial chapter or the metropolitan political subdivision chapter. The duly elected presidents of highly-urbanized cities, provincial chapters, the Metropolitan Manila chapter and metropolitan political subdivision chapters shall constitute the National Liga ng mga Barangay.