<prompt> Translate the following text to EnglishTumechagua na kutumia zana mbalimbali na kubadilika, baadhi ya ambayo yalitolewa kwetu kupitia Sheria ya Wafanyakazi wa GAO ya 1980 na sheria yetu ya 2000, lakini wengi wao wanapatikana kwa mashirika ya shirikisho.  <response>: We have identified and made use of a variety of tools and flexibilities, some of which were made available to us through the GAO Personnel Act of 1980 and our 2000 legislation, but most of which are available to federal agencies. 