No ordinance or regulation enacted under subdivision (a)(4), (a)(5), (a)(6), (a)(7), or (a)(10) of § 31-12-12 shall be effective until signs giving notice of the local traffic regulations are posted upon or at the entrances to the highway or part of it as may be most appropriate.

History of Section.
P.L. 1950, ch. 2595, art. 21, § 8; G.L. 1956, § 31-12-13.