<prompt> Translate the following text to EnglishKabla ya 1970, huduma za posta zilizotolewa na Idara ya Ofisi ya Posta zilikuwa zimeandikwa kama sehemu ya Kichwa cha 39.  <response>: Prior to 1970, the array of mail services provided by the Post Office Department was codified as part of Title 39. 