A. 
No maximum speed limit specified by this chapter, other than the general limit of 30 miles per hour specified in § 203-2C hereof, shall be effective until signs or markings giving notice thereof are posted on the highways or parts thereof which are subject to such limit.
B. 
One such sign or marking shall be posted at each end of the highway or part thereof subject to such limit, and additional signs or markings shall be posted between those at each end if the Town Board shall, by resolution, find that such additional signs or markings are reasonably required to give adequate notice to the drivers of motor vehicles of such limit.