(a) Every cemetery shall erect, exhibit, keep and maintain maps delineating lots, plots, roads, avenues, paths, alleys, and walks by their respective names or designations.

(b) Every cemetery shall supply readable copies of such maps, or pertinent sections thereof without charge, to all interested persons. Plot owners shall be advised, in writing, of the availability of the maps.

(c) Every cemetery shall maintain appropriate identifying and directional signs at each and every intersection of the roads, avenues, paths, alleys and walks in the cemetery; said signs shall be made of weatherproof material and unobstructed, clear and legible. Where a cemetery has denominated subdivisions or sections by name, letter or other convenient identification, the boundaries of each said section or subdivision shall be likewise so identified. This subdivision shall not apply to cemeteries at which a full view of the whole area of its developed grounds is within sight of the main entrance.