In each building, including commercial, residential and institutional structures, served during regular business hours by an unsupervised automatic passenger elevator for use by the general public, the elevator, or at least the left elevator where there is more than one elevator in any bank of elevators, shall be equipped with elevator controls, within the elevator and at each floor level served by the elevator, which have tactile identification or braille markings, pursuant to the following schedule:
All tactile identification except braille shall be in contrasting colors and consist of raised letters, numbers, labels or plaques for persons with a visual disability .
410 ILCS 30/1