This table provides an overview of the conditions that must be met before counteraction is required under the various chapters of the UK hybrid rules. For more detailed information on the hybrid rules that have been in effect since 1 January 2017, and the numerous changes made to them since then, see Practice Note: Hybrid mismatches—introduction to the rules. Relevant chapter of the hybrid rules Individual condition(s) Payment/quasi-payment is made Payer or payee within charge to corporation tax (CT) Hybrid deduction/non-inclusion (D/NI) mismatch or double deduction (DD) Relevance of connection/structured arrangement Ch 3: Financial instruments Financial instrument (section 259CA(2) of the Taxation (International and Other Provisions) Act 2010 (TIOPA 2010)) Yes, under, or in connection with, a financial instrument (Condition A) (TIOPA 2010, s 259CA(2)) Yes, Condition B (TIOPA 2010, s 259CA(3)) Reasonable to suppose that, but for these provisions and any foreign equivalent provisions, there would (applying the 'relevant assumptions') be a D/NI mismatch in relation to the payment or quasi-payment (Condition C for Chapter 3 and Condition D for Chapters 4, 5 and 7) (TIOPA 2010,