The substitution entry process provides runners who can no longer participate, the opportunity to “hand over” their entry to another runner.
Substitution entries provide an important logistical function that contributes to athletes’ safety on race day. Runners withdraw for a number of reasons, but it’s not just a small matter of handing their race numbers over to a friend.
Each runner’s personal profile – which includes important medical and emergency information – is linked to his/her race number, and the substitution process facilitates the linking of a newly-issued number to the new participant.