Vehicles manufactured before what year are exempt from having a non-glare indicator for multi-beam systems?

Vehicles manufactured before 1948 are exempt from the requirement of having a non-glare indicator for multi-beam systems. This exemption is based on historical regulations and advancements in vehicle design and technology. The requirement for a non-glare indicator was implemented to enhance safety by minimizing the discomfort and distraction to other drivers caused by bright lights from oncoming vehicles. However, since vehicles produced before 1948 were designed with significantly different technologies and standards, they do not fall under this modern safety regulation. As such, the regulation specifically recognizes the vintage nature of these vehicles, acknowledging that they were built before these safety features became standard in the industry.