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This rulemaking would consolidate the regulations governing bovine tuberculosis (TB), currently found in 9 CFR part 77, and those governing brucellosis, currently found in 9 CFR part 78. As part of this consolidation, we are proposing to transition the TB and brucellosis programs away from a State status system based on disease prevalence. Instead, States and tribes would implement an animal health plan that identifies sources of the diseases within the State or tribe and specifies mitigations to address the risk posed by these sources. The consolidated regulations also would set forth standards for surveillance, epidemiological investigations, and affected herd management that must be incorporated into each animal health plan, with certain limited exceptions; conditions for the interstate movement of cattle, bison, and captive cervids; and conditions for APHIS approval of tests for bovine TB or brucellosis. Finally, the rulemaking would revise the import requirements for cattle and bison to make these requirements clearer and ensure that they more effectively mitigate the risk of introduction of the diseases into the United States.