Sheppard Air Force Base residents are undergoing new requirements today. Those currently housed in Sheppard dormitories, along with new applicants, are required to certify whether they or someone they are living with is a registered sex offender. Residents who cannot certify registration will have to provide additional information. Base officials will then determine continued occupancy for the resident. They say the purpose of the registration is to ensure safety for all single airmen and military families.