A program to control pullorum disease and fowl typhoid in poultry flocks and hatcheries and the products thereof is hereby in effect and shall become mandatory upon all hatcheries to participate. Those poultry and hatchery operators tested clean and meeting other requirements of this Part will be issued New York Pullorum-Typhoid Clean Flock (or hatchery) certificates until such time as the entire State shall have been classified U.S. Pullorum-Typhoid Clean by USDA APHIS.