Click here for a history of USPS first-class rates since 1885 (Source = Postal Rate Commission. Our story so far - A postal alphabet ...
When the Postal Service seeks an increase in domestic postal rates, it must wait for a review and recommendation from the Postal Rate Commission, an independent agency of the federal government.
Postal Rate Commission (PRC): an independent federal agency that makes recommendations concerning USPS requests for changes in postal rates and mail classification. Postal razzo: (It.) rocket mail.
See also: Crease, Stamp, Local, Nondenominated, Official stamps
 
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