<prompt> Translate the following text to EnglishMabadiliko ya kiwango au huduma ya mazungumzo pia yanaweza kukosekana na viwango vya msingi vilivyoelezwa kwa viwango na uainishaji wa barua katika Sheria ya Utaratibu.  <response>: Negotiated rate or service changes also may run afoul of the substantive standards prescribed for rates and mail classifications in the Reorganization Act. 