Agreement between Post Office Department and National Association of Letter Carriers AFL-CIO, National Association of Post Office and General Services Maintenance Employees, National Association of Post Office Mail Handlers, Watchmen, Messengers, and Group Leaders AFLCIO, 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, Sept. 24, 1966-Oct. 31, 1967.