<prompt> Translate the following text to SwahiliThe second set of rules,8 apply to Postal Service proposals to implement new services that would supplement, but not alter, existing mail classifications and rates on a provisional basis for a limited time.  <response>: Mfumo wa pili wa sheria unatumika kwa mapendekezo ya Huduma ya Posta ya kutekeleza huduma mpya ambazo zingeongeza, lakini si kubadilisha, uainishaji wa barua na viwango vya sasa kwa msingi wa muda kwa muda mdogo. 