Read on my fellow building occupant. Manufacturers of exit signs must allow for the color differences and, therefore, have a problem. Some choose to sell their products packaged with both colors. That is a wasteful and expensive solution to the problem. It is however a safe way to buy the product.
Many vendors sell the color specified by the buyer.
This response guarantees a certain percentage ordered in the wrong color, requiring the restocking, repurchasing, and reshipment of the exit signs. More time is then wasted as building team members argue over who was at fault for the mistake and incumbent delay. All because the codes are inconsistent about the color of a sign. However, this is an example of a situation over which you may have some control, because participation in the revision process is open to anyone. I hope the ICC will be able to meet their goal and remedy the code morass by the end of year 2000.