<prompt> Translate the following text to EnglishMkataba wa kwanza unaelezea mamlaka ya kisheria ya sasa ya Huduma ya Posta kuanzisha bidhaa na huduma mpya, jukumu la Tume ya Kiwango cha Posta katika mchakato huo, na utaratibu wa utaratibu unaopatikana kwa ajili ya idhini ya haraka ya ubunifu kama huo.  <response>: The first outlines the Postal Services current legal authority to introduce new products and services, the role of the Postal Rate Commission in that process, and the procedural mechanisms available for expedited approval of such innovations. 