12 years for a Rural Carrier to max out at the top of the pay scale. Relief carriers can be required to be trained on up to three routes. A relief carrier may be required to carry a route other than the primary route. The time would then be recorded on the PS Form 4240 for that route. PS Form 1234 Utility Card (commonly called green card) is used to record work hours when the carrier is doing miscellaneous duties or when attending training. Carriers will use more than one utility card if they work in more than one station. All times are compiled by the timekeeper and submitted for pay. References External links USPS Domestic Mail Manual, Chapter A010, Standard Addressing Formats BLS web page on letter carriers job descriptions and projected workforce status 1903 film of carrier receiving RFD mail to deliver in Westminster, Maryland, from the Library of Congress Canada Post Rural society in the United States United States Postal Service