39:4-183.8.Ā  Materials
Permanent traffic signs should be made of metal or comparable durable material;Ā  wood may be used for large signs and also for temporary and seasonalĀ  signs;Ā  heavy cardboard may be used for special occasions or emergencies.

L.1941, c. 345, p. 906, s. 9.Ā  Amended by L.1951, c. 23, p. 104, s. 84.
Ā