Ind. Code § 9-21-18-13
A pedestrian crossing sign that is installed after July 1, 1990, to control the movement of vehicular and pedestrian traffic in an area subject to this chapter must meet the following requirements:
(2) The sign must be either rectangular or square.
[Pre-1991 Recodification Citation: 9-4-1-29.1(f).]
As added by P.L.2-1991, SEC.9.