The second phase is the true candidature stage: the accepted applicant cities (from now on referred to as "candidate cities") are required to submit a second questionnaire in the form of an extended, more detailed, candidature file.[2] These files are carefully studied by the IOC Evaluation Commission, a group composed of IOC members, representatives of international sport federations, NOCs, athletes, the International Paralympic Committee, and international experts in various fields.[3] It is chaired by Sir Craig Reedie.