During the one-hundred-twenty-sixth session of WP.29 of March 2002 , the Executive Committee of the 1998 Agreement ( AC.3 ) adopted a Program of Work , which includes the development of a global technical regulation ( gtr ) to address neck injuries in crashes . The United States of America ( U.S.A. ) volunteered to lead the group 's efforts and develop a document detailing the recommended requirements for the gtr .