Does the requirement automatically drop exactly to the 46-inch max height after the 10-inch (depth) limit has been reached?
Yes, according to 1194.25 the requirement is written as a step function. It is recognized that other international regulations that require a linear progression of the maximum height of controls between 54 inches and 46 inches. Note that a manufacturer may attempt to make a case for equivalent facilitation if the height of a control is decreased according to a range or linear progression over the control depth, rather than making a quantum step to decrease the depth of the control.
