<prompt> Translate the following text to EnglishSheria hiyo ilimwamuru Msimamizi wa GSA kutoa miongozo ili kuhakikisha kwamba mashirika yanakuza, kuhamasisha, na kuwezesha matumizi ya programu za wasafiri wa mara kwa mara zinazotolewa na mashirika ya ndege, hoteli, na wauzaji wa kukodisha gari na wafanyikazi wa shirikisho ambao wanafanya safari rasmi.  <response>: The statute directed the Administrator of GSA to issue guidelines to ensure that agencies promote, encourage, and facilitate the use of frequent traveler programs offered by airlines, hotels, and car rental vendors by federal employees who engage in official travel. 