Guidance Bovine TB: Inconclusive Reactors 3 year rule changes: frequently asked questions Detailed information explaining the changes to the Inconclusive Reactors (IR) 3 year rule. Part of: Bovine TB (Sub-topic) First published: 17 December 2021 Last updated: 17 December 2021 Documents Bovine TB: Inconclusive Reactors 3 year rule changes: frequently asked questions Bovine TB: Inconclusive Reactors 3 year rule changes: frequently asked questions , HTML HTML