UCI CYCLING REGULATIONS  16.3.006  Each visually impaired athlete is allowed a maximum of one pilot for any para-cycling  competition. The athlete and his pilot shall have the same sporting nationality.  16.3.007  In the event of an injury or illness and upon presentation of a medical certificate, the pilot  may be replaced by another pre-registered pilot up to 24 hours before the official start of  the competition in which the tandem is taking part. After this deadline, no change will be  allowed. (text modified on 26.06.07; 01.01.09; 01.02.11; 01.01.16; 01.02.17)  (article introduced on 01.02.08; text modified on 01.10.12).  E0121  PARA-CYCLING  8 