A separate and unique identifier may be designed and approved in connection with or in commemoration of a major NASA program. Each approved identifier shall be officially identified by its title such as ``Apollo,'' ``Skylab,'' ``Viking,'' ``Space Shuttle,'' ``Space Station,'' or a major NASA anniversary. NASA Program Identifiers shall be used as set forth in Sec. 1221.112 pursuant to approval as set forth in Sec. 1221.114.