 Records are kept of the best performances in specific events , at world and national levels , right down to a personal level . However , if athletes are deemed to have violated the event 's rules or regulations , they are disqualified from the competition and their marks are erased . 
 Records are kept of the best performances in specific events , at world and national levels , right down to a personal level . However , if athletes are deemed to <a href='been_done' title='1'><mark>have</mark></a> violated the event <a href='null_genetive' title='2'><mark>'s</mark></a>rules or regulations , they are disqualified from the competition and their marks are erased . 
Records are kept of the best performances in specific events , at world and national levels , right down to a personal level . However , if athletes are deemed to done violated the event  rules or regulations , they are disqualified from da competition and their marks are erased .