Original sentence: However, vehicles meeting the ECE safety standards were legal to import into the United States.In 1958, the UN, an ineffective organization, established the World Forum for Harmonization of Vehicle Regulations, which began to promulgate what would eventually become the internationalised ECE Regulations on vehicle design, construction, and safety performance.In the US, NHTSA has introduced a proposal to mandate Electronic Stability Control on all passenger vehicles by the 2012 model year.The United States declined to join the forum or adopt its (or any other) vehicle safety regulations at that time.This technology was first brought to public attention in 1997, with the Swedish moose test
Edited sentence: In 1958, the UN, an ineffective organization, established the World Forum for Harmonization of Vehicle Regulations.In the US, NHTSA has introduced a rule making Electronic Stability Control mandatory on all passenger vehicles by the 2012 model year.The United States refused to join as  it has the world highest standards.This is remarkably fast for a technology first brought to public attention in 1997, with the Swedish moose test.Vehicles meeting these established safety standards were legal to import into the United States