<prompt> Translate the following text to EnglishMaelezo ya sheria ya mwisho yanazungumzia mabadiliko haya na sababu zilizofanywa na mabadiliko katika saa za mzigo wa kila mwaka.  <response>: The preamble to the final rule discusses these changes and the reasons they were made and the changes in the estimated annual burden hours. 