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 ipa is now contained in the Department of Agriculture Organic Act of 1944, as amended (7 
UES C3 0429) 
Provisions of the Plan are changed from time to time to conform with the development of the 
industry and with new information as it becomes available. These changes are based on 
recommendations made at the biennial national Plan conferences by official delegates 
representing participating breeders, hatcheries, and flock owners 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, U.S. Department of Agriculture, 
Animal and Plant Health Inspection Service, Veterinary Services, Room 770, Federal Building, 
6505 Belcrest Road, Hyattsville, MD 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 That 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) 
Detaware (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) 
Michigan (1989) 
Wisconsin (1989) 
Louisiana (1989) 
Montana (1991) 
U.S. Pullorum - Typhoid Clean State, Turkeys 
Oregon (1975) 
California (1980) 
Colorado (1985) 
U.S. M. Gallisepticum Clean State, Turkeys 
Illinois (1980) 
Minnesota (1980) 
Indiana (1981) 
Iowa (1981) 
Nebraska (1981) 
North Carolina (1982) 
National Poultry Improvement Plan: 
Exhibition Poultry, and Game Birds. 
Ohio (1990) 
Wisconsin (1985) 
Virginia (1986) 
West Virginia (1987) 
New Jersey (1988) 
1992 Directory of Participants Handling Waterfowl, 
Published by the U.S. Department of Agriculture, Animal and Plant Health Inspection Service- 
Veterinary Services, Room 770, Federal Building, 6505 Belcrest Road, Hyattsville, MD 20782. 
