504. The loss of the right to attend the sittings of the council of the municipality entails the loss of the right to attend, as a member, the sittings of(1) any committee or commission of the municipality;
(2) the council and any committee or commission of the regional county municipality, of the urban or regional community or of an intermunicipal board of management;
(3) any other board, committee, commission or public body of which the person is a member by reason of the fact that he is a member of the council of the municipality, of the regional county municipality, of the urban or regional community or of an intermunicipal board of management.