The National Poultry Improvement Plan became operative July 1, 1935, and the National Turkey 
Improvement Plan became operative September 25, 
1943, with the approval of the Secretary of 
Agriculture. On December 3, 1971, the two Plans were combined under one title, "The National 
Poultry Improvement Plan," with separate provisions applicable to the different types of 
poultry. 
The Plan operates through an appropriation by Congress to the U. S. Department of 
Agriculture to be used in cooperation with the State authorities in the administration of 
regulations for the improvement of poultry, poultry products, and hatcheries. Authority for the 
administration of the Plan is now contained in the Department of Agriculture Organic Act of 
1944, as amended (7 U.S.C. 429). 
Provisions of the Plan are changed from time to time to conform with the development of the 
industry and with new information as 
recommendations made at the Biennial 
it becomes available. These changes are based on 
Plan Conferences by official delegates 
representing participating breeders, hatcheries, and flockowners from all cooperating States. 
Current provisions of the Plan are described in a publication entitled "The National Poultry 
Improvement Plan and Auxiliary Provisions." 
The publication is available from Official State 
Agencies or on request to the National Poultry Improvement Plan, APHIS-VS, Room 771, FCB #1, 
Hyattsville, Maryland 20782. 
Trade names are mentioned in this publication solely to provide specific information. The 
mention of such names does not constitute a guarantee or warranty of the product. 
States Which Have Received Recognition for Their Efforts in Controlling Certain 
Hatchery - Disseminated Diseases Under the National Poultry Improvement Plan. 
U.S. PULLORUM - TYPHOID CLEAN STATE 
Arkansas (1975) 
Connecticut (1975) 
Florida (1975) 
Illinois (1975) 
Maine (1975) 
Massachusetts (1975) 
Minnesota (1975) 
Mississippi (1975) 
Nebraska (1975) 
New Hampshire (1975) 
North Carolina (1975) 
North Dakota (1975) 
Ohio (1975) 
South Dakota (1975) 
Utah (1975) 
Vermont (1975) 
Alabama (1976) 
Georgia (1976) 
Iowa (1976) 
Pennsylvania (1977) 
Virginia (1978) 
Tennessee (1979) 
Maryland (1980) 
South Carolina (1980) 
Texas (1980) 
Delaware (1981) 
Indiana (1981) 
Missouri (1982) 
Kentucky (1984) 
Rhode Island (1985) 
Kansas (1986) 
Oklahoma (1986) 
Washington (1987) 
New Jersey (1988) 
New York (1988) 
West Virginia (1988) 
U.S. PULLORUM - TYPHOID CLEAN STATE, TURKEYS 
Oregon (1975) 
California (1980) 
Wisconsin (1985) 
Colorado (1985) 
U.S. M. GALLISEPTICUM CLEAN STATE, TURKEYS 
Illinois (1980) 
Minnesota (1980) 
Indiana (1981) 
Iowa (1981) 
Nebraska (1981) 
National Poultry Improvement Plan: 
Exhibition Poultry, and Game Birds. 
North Carolina (1982) 
Wisconsin (1985) 
Virginia (1986) 
West Virginia (1987) 
New Jersey (1988) 
1989 Directory of Participants Handling Waterfowl, 
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Published by the Animal and Plant Health Inspection Service-Veterinary Services, U.S. Department 
of Agriculture, Room 771, FCB #1, Hyattsville, MD 20782. 
