The form contains mandatory and optional items

for filling and it is up to the user which to fill in the optional items. The registration form is information-based to provide as much information as possible about the shooter that will be used by race organizers and your subsequent sign-up (sign-in) for a particular shooting match.

The more you fill in the optional items during you register

the less you will have to deal with filling in the data when you sign up to the appropriate race. Sensitive information such as date of birth, passport number, firearms licence, or telephone number (and others), are not freely available (visible on the webpage) and are only available to SORS users with MANAGER privileges (ie club president, who organize the appropriate races and need detailed information about the shooter who enters the shooting match).