4.01. On one of the outer walls of the building in which his consulting-room is located or on the land on which such building is located, a hearing-aid acoustician may post up a sign with stable luminosity mentioning all or part of that indicated in section 2.01.
If the building in which his consulting-room is located is at a crossroads, the hearing-aid acoustician may post-up such sign on the outer walls or on the land facing each of the converging roads.
R.R.Q., 1981, c. A-33, r. 7, s. 4.01.