mpairment documentation is a form or letter completed by your physician that identifies your impairment and describes how your impairment impacts your ability to run or take part in running events. Classification is a code established by the International Paralympic Committee (IPC) that groups athletes by type and degree of impairment. A sport class is allocated by the national or international governing body of Para Athletics. In order to compete in the Para Athletics Division of the Boston Marathon, the athlete must hold a Para athletics classification. Learn More Para Athletes What is the difference between impairment documentation and Para athletics classification?  Use the Title for an admin friendly name so content authors can refer back to this FAQ item