› › Agreement Between United States Post Office Department And National Association Of Letter Carriers Afl Cio National Association Of Post Office And General Services Maintenance Employees National Association Of Special Delivery Messengers Afl Cio National Federation Of Post Office Motor Vehicle Employees Afl Cio National Rural Letter Carriers Association United Federation Of Postal Clerks Afl Cio April 1 1963 March 31 1964 Etc