Another linked Forbes article fingers the UPU, a UN agency, as the source of the rate schedules: https://www.forbes.com/sites/wadeshepard/2017/11/05/how-the-usp

Another linked Forbes article fingers the UPU, a UN agency, as the source of the rate schedules: https://www.forbes.com/sites/wadeshepard/2017/11/05/how-the-usps-epacket-gives-postal-subsidies-to-chinese-e-commerce-merchants-to-ship-to-the-usa-cheap/2/#25be79ae53f5 https://www.forbes.com/sites/wadeshepard/2017/11/05/how-the-... Wikipedia on the UPU: https://en.wikipedia.org/wiki/Universal_Postal_Union https://en.wikipedia.org/wiki/Universal_Postal_Union