Which of the following statements is true about elevators installed before March 9, 1950?

The statement that elevators installed before March 9, 1950 can have windows if they comply with the original code is accurate. Elevators from that era are often subject to the codes that were in place at the time of their installation. As such, if the original specifications allowed for windows in the hoistway, those elevators can legally retain those features as long as they conform to the requirements of the standard applicable at the time they were built.

Understanding the context of safety standards helps appreciate why this statement holds true. While current safety regulations have evolved to prioritize various factors, including passenger safety and energy efficiency, older elevators are generally evaluated based on the codes that were in effect at the time of installation rather than being forced into complete compliance with modern standards unless significant renovations or modifications are made.

The other statements reflect misconceptions about the treatment of such elevators. For example, while newer designs adhere strictly to current codes, older systems are typically not wholly exempt from safety assessments. Additionally, statements regarding the absence of windows or mandatory upgrades do not accurately account for the considerations allowed by historical codes for elevators installed before a certain date.