City delivery service

§ 6001. City delivery service (a) The Postmaster General shall establish city delivery service for the free delivery of mail, as frequently as the public business may require, at every incorporated city, village, or borough containing a population of fifty thousand within its corporate limits. (b) The Postmaster General may establish city delivery service for the free delivery of mail— (1) at a place containing a population of not less than ten thousand, within its corporate limits, according to the last general census, taken by authority of State or United States law; or (2) at a post office which produces a gross revenue, for the preceding fiscal year, of not less than $10,000; or (3) upon consolidation of two or more post offices situated within the corporate limits of a city, village, or borough, which offices produced revenue of not less than $10,000 for the preceding fiscal year. (c) The Postmaster General may continue city delivery service at post offices where it is established, even though there is a decrease below ten thousand in population or $10,000 in gross postal revenue.