In a passenger car or truck (with a manufacturer's rated carrying capacity of not more than 1,500 pounds), who must use safety belts?

SAFETY BELT

Safety belt should be used in any case whenever the load exceeds the mentioned limit precautionary measures need to be taken in both the cases avoiding seat belt precautionary measures can result into fatal accident so that is why seat belt measures are to be taken must mostly in case of cars in car more human life  are involved then truck so in case of car carrying more capacity more precautionary measures need to be taken so seat belt is must in both the conditions weather truck or car is involved

"social stratification refers to the way people are ranked and ordered in society. in western societies, stratification is primarily seen and understood as a result of socioeconomic status, which produces a hierarchy in which access to resources, and possession of them, increases from the lower to the upper strata"

can you give a picture of the map, i'll be able to update my answer!